2026-01-27 06:14:43 SERVER -> CLIENT: 220-c278.dattaweb.com ESMTP Server 220- We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.
2026-01-27 06:14:43 CLIENT -> SERVER: EHLO 179.42.168.57
2026-01-27 06:14:43 SERVER -> CLIENT: 250-c278.dattaweb.com Hello 179.42.168.57 [179.42.168.57]250-SIZE 52428800250-8BITMIME250-PIPELINING250-AUTH LOGIN250-CHUNKING250-STARTTLS250 HELP
2026-01-27 06:14:43 CLIENT -> SERVER: STARTTLS
2026-01-27 06:14:43 SERVER -> CLIENT: 220 TLS go ahead
SMTP Error: Could not connect to SMTP host.
2026-01-27 06:14:43 CLIENT -> SERVER: QUIT
2026-01-27 06:14:43 SERVER -> CLIENT: ecurity failure554 Security failure
2026-01-27 06:14:43 SMTP ERROR: QUIT command failed: ecurity failure554 Security failure
SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting