2025-08-28 20:06:50 SERVER -> CLIENT: 220-mail.sh.cz ESMTP SH.cz Mail server; Thu, 28 Aug 2025 22:06:50 +0200220-***************************************************************220-* sh.cz mail server *220 ***************************************************************
2025-08-28 20:06:50 CLIENT -> SERVER: EHLO www.nexnet.cz
2025-08-28 20:06:50 SERVER -> CLIENT: 250-mail.sh.cz Hello www.nexnet.cz [213.192.44.186], pleased to meet you.250-ENHANCEDSTATUSCODES250-SIZE250-EXPN250-ETRN250-ATRN250-CHECKPOINT250-8BITMIME250-AUTH PLAIN LOGIN DIGEST-MD5 CRAM-MD5250-STARTTLS250-VRFY250 HELP
2025-08-28 20:06:50 CLIENT -> SERVER: STARTTLS
2025-08-28 20:06:50 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS
2025-08-28 20:06:50 CLIENT -> SERVER: EHLO www.nexnet.cz
2025-08-28 20:06:50 SERVER -> CLIENT: 250-mail.sh.cz Hello www.nexnet.cz [213.192.44.186], pleased to meet you.250-ENHANCEDSTATUSCODES250-SIZE250-EXPN250-ETRN250-ATRN250-CHECKPOINT250-8BITMIME250-AUTH PLAIN LOGIN DIGEST-MD5 CRAM-MD5250-VRFY250 HELP
2025-08-28 20:06:50 CLIENT -> SERVER: AUTH CRAM-MD5
2025-08-28 20:06:50 SERVER -> CLIENT: 334 PDIwMjUwODI4MjIwNjUwQG1haWwuc2guY3o+
2025-08-28 20:06:50 CLIENT -> SERVER: [credentials hidden]
2025-08-28 20:06:55 SERVER -> CLIENT: 535 5.7.8 Authentication credentials invalid
2025-08-28 20:06:55 SMTP ERROR: Username command failed: 535 5.7.8 Authentication credentials invalid
SMTP Error: Could not authenticate.
2025-08-28 20:06:55 CLIENT -> SERVER: QUIT
2025-08-28 20:06:55 SERVER -> CLIENT: 221 2.0.0 mail.sh.cz closing connection
SMTP Error: Could not authenticate.
Message could not be sent.Mailer Error: SMTP Error: Could not authenticate.