diff --git a/proxy studio/ContentView.swift b/proxy studio/ContentView.swift
index ec06705..c6cf74e 100644
--- a/proxy studio/ContentView.swift	
+++ b/proxy studio/ContentView.swift	
@@ -67,7 +67,11 @@ struct ContentView: View {
                 .padding()
             }
         } detail: {
+            // The minimum size belongs to the detail column, not the split view. A fixed
+            // window minimum smaller than sidebar + detail + inspector minimums makes the
+            // split view re-solve its constraints forever and AppKit aborts.
             detail
+                .frame(minWidth: 520, minHeight: 550)
                 .navigationTitle(destination?.rawValue ?? "Proxy Studio")
                 .navigationSubtitle(destination == .dns ? unifi.connectionLabel : (store.isDemo ? "Demo Server" : store.serverName))
                 .toolbar {
@@ -128,7 +132,6 @@ struct ContentView: View {
             ),
             prompt: destination == .dns ? "Search DNS Records" : "Search Hosts"
         )
-        .frame(minWidth: 900, minHeight: 550)
         .task {
             guard ProcessInfo.processInfo.environment["XCODE_RUNNING_FOR_PREVIEWS"] != "1" else { return }
             await store.restoreConnection()
diff --git a/proxy studio/UniFiDNSView.swift b/proxy studio/UniFiDNSView.swift
index 84830b2..bd6d4ef 100644
--- a/proxy studio/UniFiDNSView.swift	
+++ b/proxy studio/UniFiDNSView.swift	
@@ -38,7 +38,7 @@ struct UniFiDNSView: View {
             Table(filteredRecords, selection: $selectedID, sortOrder: $sortOrder) {
                 TableColumn("Domain", value: \.domainName)
                     .width(min: 160, ideal: 220)
-                TableColumn("Type", value: \.recordType).width(70)
+                TableColumn("Type", value: \.recordType).width(80)
                 TableColumn("Value", value: \.value).width(min: 150, ideal: 200)
                 TableColumn("TTL") { record in
                     Text(record.ttlSeconds.map { "\($0) s" } ?? "—")
@@ -49,16 +49,16 @@ struct UniFiDNSView: View {
             }
             .contextMenu(forSelectionType: String.self) { ids in
                 if let id = ids.first, let record = store.records.first(where: { $0.id == id }) {
-                    Button("Edit A Record…") { edit(record) }.disabled(record.type != "A_RECORD" || store.isBusy)
+                    Button("Edit \(record.recordType) Record…") { edit(record) }.disabled(record.kind == nil || store.isBusy)
                     Divider()
                     Button("Delete Record…", role: .destructive) { deleting = record }.disabled(store.isBusy)
                 }
             } primaryAction: { ids in
-                if let id = ids.first, let record = store.records.first(where: { $0.id == id }), record.type == "A_RECORD", !store.isBusy { edit(record) }
+                if let id = ids.first, let record = store.records.first(where: { $0.id == id }), record.kind != nil, !store.isBusy { edit(record) }
             }
             .overlay {
                 if filteredRecords.isEmpty {
-                    ContentUnavailableView("No DNS Records", systemImage: "globe", description: Text(search.isEmpty ? "Add an A record for the selected site." : "No records match your search."))
+                    ContentUnavailableView("No DNS Records", systemImage: "globe", description: Text(search.isEmpty ? "Add a DNS record for the selected site." : "No records match your search."))
                 }
             }
             Divider()
@@ -83,7 +83,7 @@ struct UniFiDNSView: View {
                     .help("Add DNS Record").keyboardShortcut("n").disabled(store.isBusy)
                 Button { if let record = selectedRecord { edit(record) } } label: {
                     Label("Edit DNS Record", systemImage: "square.and.pencil")
-                }.help("Edit A Record").disabled(selectedRecord?.type != "A_RECORD" || store.isBusy)
+                }.help("Edit DNS Record").disabled(selectedRecord?.kind == nil || store.isBusy)
             }
         }
         .sheet(isPresented: $showConnection) { UniFiConnectionSheet(store: store) }
@@ -173,24 +173,64 @@ struct DNSRecordEditor: View {
     let isNew: Bool
     @Environment(\.dismiss) private var dismiss
     @State private var record: DNSRecord
+    @State private var kind: DNSRecordKind
     @State private var domain: String
-    @State private var address: String
+    @State private var target: String
     @State private var ttl: String
+    @State private var priority: String
+    @State private var weight: String
+    @State private var port: String
+    @State private var service: String
+    @State private var srvProtocol: String
     @State private var error: String?
 
     init(store: UniFiStore, record: DNSRecord, isNew: Bool) {
         self.store = store
         self.isNew = isNew
         _record = State(initialValue: record)
+        _kind = State(initialValue: record.kind ?? .a)
         _domain = State(initialValue: record.domain ?? "")
-        _address = State(initialValue: record.ipv4Address ?? "")
+        _target = State(initialValue: record.target ?? "")
         _ttl = State(initialValue: String(record.ttlSeconds ?? 14400))
+        _priority = State(initialValue: String(record.priority ?? 10))
+        _weight = State(initialValue: String(record.weight ?? 0))
+        _port = State(initialValue: record.port.map(String.init) ?? "")
+        _service = State(initialValue: record.service ?? "")
+        _srvProtocol = State(initialValue: record.protocol ?? "_tcp")
     }
 
-    private var valid: Bool {
-        DNSRecord.isValidDomain(domain.trimmingCharacters(in: .whitespacesAndNewlines))
-            && DNSRecord.isValidIPv4(address.trimmingCharacters(in: .whitespacesAndNewlines))
-            && Int(ttl).map { (0...86400).contains($0) } == true
+    /// Builds the record from the form, keeping only the fields that belong to the selected type.
+    private var draft: DNSRecord {
+        var draft = DNSRecord(id: record.id, type: kind.rawValue, enabled: record.enabled,
+                              domain: Self.normalizedDomain(domain))
+        draft.target = kind == .txt ? target : kind.targetIsDomain
+            ? Self.normalizedDomain(target) : target.trimmingCharacters(in: .whitespacesAndNewlines)
+        if kind.usesTTL { draft.ttlSeconds = Int(ttl) }
+        if kind.usesPriority { draft.priority = Int(priority) }
+        if kind == .srv {
+            draft.weight = Int(weight)
+            draft.port = Int(port)
+            draft.service = Self.normalizedServiceLabel(service)
+            draft.protocol = Self.normalizedServiceLabel(srvProtocol)
+        }
+        return draft
+    }
+
+    private var valid: Bool { (try? draft.payload()) != nil }
+
+    private var protocolOptions: [String] {
+        ["_tcp", "_udp"].contains(srvProtocol) ? ["_tcp", "_udp"] : ["_tcp", "_udp", srvProtocol]
+    }
+
+    private static func normalizedDomain(_ value: String) -> String {
+        var value = value.trimmingCharacters(in: .whitespacesAndNewlines).lowercased()
+        if value.hasSuffix(".") { value.removeLast() }
+        return value
+    }
+
+    private static func normalizedServiceLabel(_ value: String) -> String {
+        let value = value.trimmingCharacters(in: .whitespacesAndNewlines).lowercased()
+        return value.isEmpty || value.hasPrefix("_") ? value : "_" + value
     }
 
     var body: some View {
@@ -200,15 +240,37 @@ struct DNSRecordEditor: View {
                 Spacer()
             }.padding(20)
             Form {
-                Section("A Record") {
+                Section(kind == .forwardDomain ? "Forward Domain" : "\(kind.label) Record") {
                     LabeledContent("Site", value: store.sites.first { $0.id == store.selectedSiteID }?.name ?? "")
-                    TextField("Domain", text: $domain, prompt: Text("app.example.com"))
-                    TextField("IPv4 Address", text: $address, prompt: Text("192.168.1.20"))
-                    TextField("TTL (seconds)", text: $ttl)
+                    Picker("Type", selection: $kind) {
+                        ForEach(DNSRecordKind.allCases) { kind in
+                            Text(kind == .forwardDomain ? "Forward Domain" : kind.label).tag(kind)
+                        }
+                    }
+                    .disabled(!isNew)
+                    if kind == .srv {
+                        TextField("Service", text: $service, prompt: Text("_ldap"))
+                        Picker("Protocol", selection: $srvProtocol) {
+                            ForEach(protocolOptions, id: \.self) { Text($0).tag($0) }
+                        }
+                    }
+                    TextField("Domain", text: $domain, prompt: Text(kind == .srv ? "example.com" : "app.example.com"))
+                    if kind == .txt {
+                        TextField(kind.targetLabel, text: $target, prompt: Text(kind.targetPrompt), axis: .vertical)
+                            .lineLimit(1...4)
+                    } else {
+                        TextField(kind.targetLabel, text: $target, prompt: Text(kind.targetPrompt))
+                    }
+                    if kind.usesPriority { TextField("Priority", text: $priority) }
+                    if kind == .srv {
+                        TextField("Weight", text: $weight)
+                        TextField("Port", text: $port, prompt: Text("389"))
+                    }
+                    if kind.usesTTL { TextField("TTL (seconds)", text: $ttl) }
                     Toggle("Enabled", isOn: $record.enabled)
                 }
                 Section {
-                    Text("TTL must be between 0 and 86400 seconds. For a proxied service, use the IP address of your reverse proxy.")
+                    Text(kind.helpText)
                         .font(.callout).foregroundStyle(.secondary)
                 }
             }
@@ -223,19 +285,56 @@ struct DNSRecordEditor: View {
                 Button(isNew ? "Add" : "Save") {
                     Task {
                         error = nil
-                        record.domain = domain.trimmingCharacters(in: .whitespacesAndNewlines).lowercased()
-                        record.ipv4Address = address.trimmingCharacters(in: .whitespacesAndNewlines)
-                        record.ttlSeconds = Int(ttl)
                         do {
-                            try await store.save(record, isNew: isNew)
+                            try await store.save(draft, isNew: isNew)
                             dismiss()
                         } catch { self.error = error.localizedDescription }
                     }
                 }.keyboardShortcut(.defaultAction).disabled(!valid || store.isBusy)
             }.padding(20)
         }
-        .frame(width: 500, height: 440)
+        .frame(width: 500, height: kind == .srv ? 620 : 480)
         .interactiveDismissDisabled(store.isBusy)
+        // A value typed for one type (such as an IPv4 address) rarely fits another.
+        .onChange(of: kind) { target = "" }
+    }
+}
+
+private extension DNSRecordKind {
+    var targetLabel: String {
+        switch self {
+        case .a: "IPv4 Address"
+        case .aaaa: "IPv6 Address"
+        case .cname: "Target Domain"
+        case .mx: "Mail Server"
+        case .txt: "Text"
+        case .srv: "Target Server"
+        case .forwardDomain: "DNS Server"
+        }
+    }
+
+    var targetPrompt: String {
+        switch self {
+        case .a: "192.168.1.20"
+        case .aaaa: "fd00::20"
+        case .cname: "server.example.com"
+        case .mx: "mail.example.com"
+        case .txt: "v=spf1 -all"
+        case .srv: "server.example.com"
+        case .forwardDomain: "192.168.1.53"
+        }
+    }
+
+    var helpText: String {
+        switch self {
+        case .a: "TTL must be between 0 and 86400 seconds. For a proxied service, use the IP address of your reverse proxy."
+        case .aaaa: "TTL must be between 0 and 86400 seconds. For a proxied service, use the IPv6 address of your reverse proxy."
+        case .cname: "The domain resolves to the same address as the target domain. TTL must be between 0 and 86400 seconds."
+        case .mx: "Mail servers with lower priority values are preferred. Priority must be between 0 and 65535."
+        case .txt: "TXT records hold free-form text, commonly used for domain verification and SPF."
+        case .srv: "The record is published as _service._protocol.domain. Lower priority values are preferred; weight balances servers with the same priority."
+        case .forwardDomain: "Queries for this domain and its subdomains are forwarded to the DNS server instead of the gateway's upstream resolvers."
+        }
     }
 }
 
diff --git a/proxy studio/UniFiStore.swift b/proxy studio/UniFiStore.swift
index ab7d609..764bc46 100644
--- a/proxy studio/UniFiStore.swift	
+++ b/proxy studio/UniFiStore.swift	
@@ -7,6 +7,47 @@ struct UniFiSite: Codable, Identifiable, Hashable {
     let name: String
 }
 
+/// DNS policy types supported by the UniFi Network Integration API.
+enum DNSRecordKind: String, CaseIterable, Identifiable {
+    case a = "A_RECORD"
+    case aaaa = "AAAA_RECORD"
+    case cname = "CNAME_RECORD"
+    case mx = "MX_RECORD"
+    case txt = "TXT_RECORD"
+    case srv = "SRV_RECORD"
+    case forwardDomain = "FORWARD_DOMAIN"
+
+    var id: String { rawValue }
+
+    /// Accepts both the `A_RECORD` form and the short `A` form some firmware versions report.
+    init?(apiType: String) {
+        let upper = apiType.uppercased()
+        guard let kind = Self(rawValue: upper) ?? Self(rawValue: upper + "_RECORD") else { return nil }
+        self = kind
+    }
+
+    var label: String {
+        switch self {
+        case .a: "A"
+        case .aaaa: "AAAA"
+        case .cname: "CNAME"
+        case .mx: "MX"
+        case .txt: "TXT"
+        case .srv: "SRV"
+        case .forwardDomain: "Forward"
+        }
+    }
+
+    /// Only address and alias records carry a TTL in the Integration API.
+    var usesTTL: Bool { self == .a || self == .aaaa || self == .cname }
+    var usesPriority: Bool { self == .mx || self == .srv }
+    var targetIsDomain: Bool { self == .cname || self == .mx || self == .srv }
+    /// Owner names such as `_dmarc` or `_acme-challenge` are common for these types.
+    var allowsUnderscoreOwner: Bool { self == .txt || self == .cname }
+    /// MX, TXT, and SRV records routinely share a domain; other types are one per domain.
+    var allowsMultiplePerDomain: Bool { self == .mx || self == .txt || self == .srv }
+}
+
 struct DNSRecord: Codable, Identifiable, Hashable {
     var id: String
     var type: String
@@ -16,24 +57,91 @@ struct DNSRecord: Codable, Identifiable, Hashable {
     var ipv6Address: String?
     var targetDomain: String?
     var ttlSeconds: Int?
+    var mailServerDomain: String?
+    var text: String?
+    var serverDomain: String?
+    var ipAddress: String?
+    var priority: Int?
+    var weight: Int?
+    var port: Int?
+    var service: String?
+    var `protocol`: String?
 
-    var domainName: String { domain ?? "—" }
-    var recordType: String { type.replacingOccurrences(of: "_RECORD", with: "") }
-    var value: String { ipv4Address ?? ipv6Address ?? targetDomain ?? "See UniFi Network" }
+    var kind: DNSRecordKind? { DNSRecordKind(apiType: type) }
+    var recordType: String { kind?.label ?? type.replacingOccurrences(of: "_RECORD", with: "") }
+
+    var domainName: String {
+        guard let domain else { return "—" }
+        if kind == .srv, let service, let `protocol` { return "\(service).\(`protocol`).\(domain)" }
+        return domain
+    }
+
+    /// The type-specific field holding the record's main value.
+    var target: String? {
+        get {
+            switch kind {
+            case .a: ipv4Address
+            case .aaaa: ipv6Address
+            case .cname: targetDomain
+            case .mx: mailServerDomain
+            case .txt: text
+            case .srv: serverDomain
+            case .forwardDomain: ipAddress
+            case nil: nil
+            }
+        }
+        set {
+            switch kind {
+            case .a: ipv4Address = newValue
+            case .aaaa: ipv6Address = newValue
+            case .cname: targetDomain = newValue
+            case .mx: mailServerDomain = newValue
+            case .txt: text = newValue
+            case .srv: serverDomain = newValue
+            case .forwardDomain: ipAddress = newValue
+            case nil: break
+            }
+        }
+    }
+
+    var value: String {
+        guard let kind, let target else { return "See UniFi Network" }
+        switch kind {
+        case .mx: return "\(priority.map(String.init) ?? "—") \(target)"
+        case .srv: return "\(priority.map(String.init) ?? "—") \(weight.map(String.init) ?? "—") \(port.map(String.init) ?? "—") \(target)"
+        case .txt: return "\"\(target)\""
+        case .forwardDomain: return "→ \(target)"
+        case .a, .aaaa, .cname: return target
+        }
+    }
 
     static let examples = [
         DNSRecord(id: "demo-home", type: "A_RECORD", enabled: true, domain: "home.lab", ipv4Address: "192.168.1.20", ttlSeconds: 14400),
         DNSRecord(id: "demo-photos", type: "A_RECORD", enabled: true, domain: "photos.lab", ipv4Address: "192.168.1.24", ttlSeconds: 14400)
     ]
 
-    static func isValidDomain(_ value: String) -> Bool {
+    static func isValidDomain(_ value: String, allowUnderscore: Bool = false) -> Bool {
         guard !value.isEmpty, value.count <= 127 else { return false }
         return value.split(separator: ".", omittingEmptySubsequences: false).allSatisfy { label in
             !label.isEmpty && label.count <= 63 && label.first != "-" && label.last != "-"
-                && label.utf8.allSatisfy { (97...122).contains($0) || (65...90).contains($0) || (48...57).contains($0) || $0 == 45 }
+                && label.utf8.allSatisfy {
+                    (97...122).contains($0) || (65...90).contains($0) || (48...57).contains($0) || $0 == 45
+                        || (allowUnderscore && $0 == 95)
+                }
         }
     }
 
+    /// SRV service and protocol labels, such as `_ldap` and `_tcp`.
+    static func isValidServiceLabel(_ value: String) -> Bool {
+        value.count >= 2 && value.count <= 63 && value.first == "_" && value.dropFirst().first != "-" && value.last != "-"
+            && value.dropFirst().utf8.allSatisfy { (97...122).contains($0) || (65...90).contains($0) || (48...57).contains($0) || $0 == 45 }
+    }
+
+    static func isValidIPv6(_ value: String) -> Bool {
+        var address = in6_addr()
+        return !value.contains("%") && value.withCString { inet_pton(AF_INET6, $0, &address) } == 1
+    }
+
     static func isValidIPv4(_ value: String) -> Bool {
         let parts = value.split(separator: ".", omittingEmptySubsequences: false)
         return parts.count == 4 && parts.allSatisfy {
@@ -44,14 +152,62 @@ struct DNSRecord: Codable, Identifiable, Hashable {
     }
 
     func payload() throws -> Data {
-        guard type == "A_RECORD", Self.isValidDomain(domainName),
-              Self.isValidIPv4(ipv4Address ?? ""), let ttlSeconds, (0...86400).contains(ttlSeconds) else {
-            throw ServiceError.message("Enter a valid domain, IPv4 address, and TTL between 0 and 86400 seconds.")
+        guard let kind else { throw ServiceError.message("This record type can only be edited in UniFi Network.") }
+        guard let domain, Self.isValidDomain(domain, allowUnderscore: kind.allowsUnderscoreOwner) else {
+            throw ServiceError.message("Enter a valid domain.")
         }
-        return try JSONSerialization.data(withJSONObject: [
-            "type": "A_RECORD", "domain": domainName, "ipv4Address": ipv4Address ?? "",
-            "ttlSeconds": ttlSeconds, "enabled": enabled
-        ])
+        var body: [String: Any] = ["type": kind.rawValue, "domain": domain, "enabled": enabled]
+        if kind.usesTTL {
+            guard let ttlSeconds, (0...86400).contains(ttlSeconds) else {
+                throw ServiceError.message("Enter a TTL between 0 and 86400 seconds.")
+            }
+            body["ttlSeconds"] = ttlSeconds
+        }
+        if kind.usesPriority {
+            guard let priority, (0...65535).contains(priority) else {
+                throw ServiceError.message("Enter a priority between 0 and 65535.")
+            }
+            body["priority"] = priority
+        }
+        let target = target ?? ""
+        switch kind {
+        case .a:
+            guard Self.isValidIPv4(target) else { throw ServiceError.message("Enter a valid IPv4 address.") }
+            body["ipv4Address"] = target
+        case .aaaa:
+            guard Self.isValidIPv6(target) else { throw ServiceError.message("Enter a valid IPv6 address.") }
+            body["ipv6Address"] = target
+        case .cname:
+            guard Self.isValidDomain(target) else { throw ServiceError.message("Enter a valid target domain.") }
+            guard target.caseInsensitiveCompare(domain) != .orderedSame else {
+                throw ServiceError.message("A CNAME record cannot point to itself.")
+            }
+            body["targetDomain"] = target
+        case .mx:
+            guard Self.isValidDomain(target) else { throw ServiceError.message("Enter a valid mail server domain.") }
+            body["mailServerDomain"] = target
+        case .txt:
+            guard !target.isEmpty else { throw ServiceError.message("Enter the TXT record text.") }
+            body["text"] = target
+        case .srv:
+            guard let service, Self.isValidServiceLabel(service), let `protocol`, Self.isValidServiceLabel(`protocol`) else {
+                throw ServiceError.message("Enter a valid service and protocol, such as _ldap and _tcp.")
+            }
+            guard Self.isValidDomain(target) else { throw ServiceError.message("Enter a valid target server domain.") }
+            guard let weight, (0...65535).contains(weight) else { throw ServiceError.message("Enter a weight between 0 and 65535.") }
+            guard let port, (1...65535).contains(port) else { throw ServiceError.message("Enter a port between 1 and 65535.") }
+            body["service"] = service
+            body["protocol"] = `protocol`
+            body["serverDomain"] = target
+            body["weight"] = weight
+            body["port"] = port
+        case .forwardDomain:
+            guard Self.isValidIPv4(target) || Self.isValidIPv6(target) else {
+                throw ServiceError.message("Enter the IPv4 or IPv6 address of the DNS server.")
+            }
+            body["ipAddress"] = target
+        }
+        return try JSONSerialization.data(withJSONObject: body)
     }
 }
 
@@ -183,8 +339,15 @@ final class UniFiStore {
     func save(_ record: DNSRecord, isNew: Bool) async throws {
         guard !isBusy else { throw ServiceError.message("Wait for the current request to finish.") }
         let body = try record.payload()
-        if records.contains(where: { $0.id != record.id && $0.domainName.caseInsensitiveCompare(record.domainName) == .orderedSame && $0.type == record.type }) {
-            throw ServiceError.message("An A record already exists for this domain in the selected site.")
+        let allowsMultiple = record.kind?.allowsMultiplePerDomain == true
+        if records.contains(where: {
+            $0.id != record.id && $0.kind == record.kind
+                && $0.domainName.caseInsensitiveCompare(record.domainName) == .orderedSame
+                && (!allowsMultiple || $0.value == record.value)
+        }) {
+            throw ServiceError.message(allowsMultiple
+                ? "An identical \(record.recordType) record already exists in the selected site."
+                : "A \(record.recordType) record already exists for this domain in the selected site.")
         }
         isBusy = true
         defer { isBusy = false }