2026-08-24 21:17:57 SERVER -> CLIENT: 220 out.smtp.cz ESMTP Postfix
2026-08-24 21:17:57 CLIENT -> SERVER: EHLO smtp-tester.truczkin.cz
2026-08-24 21:17:57 SERVER -> CLIENT: 250-out.smtp.cz250-PIPELINING250-SIZE 78643200250-STARTTLS250-ENHANCEDSTATUSCODES250-8BITMIME250 CHUNKING
2026-08-24 21:17:57 CLIENT -> SERVER: STARTTLS
2026-08-24 21:17:57 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS
2026-08-24 21:17:57 CLIENT -> SERVER: EHLO smtp-tester.truczkin.cz
2026-08-24 21:17:57 SERVER -> CLIENT: 250-out.smtp.cz250-PIPELINING250-SIZE 78643200250-AUTH PLAIN LOGIN250-AUTH=PLAIN LOGIN250-ENHANCEDSTATUSCODES250-8BITMIME250 CHUNKING
2026-08-24 21:17:57 CLIENT -> SERVER: AUTH LOGIN
2026-08-24 21:17:57 SERVER -> CLIENT: 334 VXNlcm5hbWU6
2026-08-24 21:17:57 CLIENT -> SERVER: [credentials hidden]
2026-08-24 21:17:57 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2026-08-24 21:17:57 CLIENT -> SERVER: [credentials hidden]
2026-08-24 21:17:57 SERVER -> CLIENT: 535 5.7.8 Error: authentication failed: authentication failure
2026-08-24 21:17:57 SMTP ERROR: Password command failed: 535 5.7.8 Error: authentication failed: authentication failure
SMTP Error: Could not authenticate.
2026-08-24 21:17:57 CLIENT -> SERVER: QUIT
2026-08-24 21:17:57 SERVER -> CLIENT: 221 2.0.0 Bye
SMTP Error: Could not authenticate.