add SMTPClient module: connection layer, message formatter, public API, tests

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-14 05:25:03 +01:00
parent 427f197bb3
commit 54ce92e280
9 changed files with 695 additions and 1 deletions
@@ -0,0 +1,14 @@
+/// Represents a complete SMTP response (possibly multi-line).
+/// SMTP responses consist of a 3-digit code and one or more text lines.
+public struct SMTPResponse: Sendable {
+	public let code: Int
+	public let lines: [String]
+
+	public var message: String {
+		lines.joined(separator: "\n")
+	}
+
+	public var isSuccess: Bool {
+		code >= 200 && code < 400
+	}
+}