S: 220 myserver ESMTP Exim 4.95 Ubuntu Sat, 17 Jan 2026 14:22:53 +0200
C: EHLO localhost
S: 250-myserver Hello static.143.61.235.167.clients.your-server.de [167.235.61.143]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-PIPE_CONNECT
250-AUTH LOGIN PLAIN
250-CHUNKING
250-STARTTLS
250 HELP
C: STARTTLS
S: 220 TLS go ahead
C: EHLO localhost
S: 250-myserver Hello static.143.61.235.167.clients.your-server.de [167.235.61.143]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-PIPE_CONNECT
250-AUTH LOGIN PLAIN
250-CHUNKING
250 HELP
C: AUTH LOGIN
S: 334 VXNlcm5hbWU6
C: dGVzdEB0ZXN0LnplZmlya2kuY29t
S: 334 UGFzc3dvcmQ6
C: SlktPzAhSlpyVl9caFxsSQ==
S: 235 Authentication succeeded
C: MAIL FROM:<test@test.zefirki.com>
S: 250 OK
C: RCPT TO:<maks.b0nd.51@gmail.com>
S: 250 Accepted
C: DATA
S: 354 Enter message, ending with "." on a line by itself
C: From: <test@test.zefirki.com>
To: <maks.b0nd.51@gmail.com>
Subject: =?UTF-8?B?U01UUCA1ODcgU1RBUlRUTFMgdGVzdA==?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Тестовая отправка через SMTP 587 + STARTTLS.
PHP raw SMTP.
.
S: 250 OK id=1vh5KP-000GDB-Im
C: QUIT
S: 221 myserver closing connection

✅ SMTP 587 тест завершён успешно