2026-04-18 10:16:26 SERVER -> CLIENT: 220-h28.core.hostnext.net ESMTP Exim 4.99.1 #2 Sat, 18 Apr 2026 12:16:26 +0200 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.
2026-04-18 10:16:26 CLIENT -> SERVER: EHLO www.dummy.isdswat.org
2026-04-18 10:16:26 SERVER -> CLIENT: 250-h28.core.hostnext.net Hello www.dummy.isdswat.org [5.9.80.16]250-SIZE 52428800250-LIMITS MAILMAX=1000 RCPTMAX=50000250-8BITMIME250-PIPELINING250-PIPECONNECT250-AUTH PLAIN LOGIN250-STARTTLS250 HELP
2026-04-18 10:16:26 CLIENT -> SERVER: STARTTLS
2026-04-18 10:16:26 SERVER -> CLIENT: 220 TLS go ahead
2026-04-18 10:16:26 CLIENT -> SERVER: EHLO www.dummy.isdswat.org
2026-04-18 10:16:26 SERVER -> CLIENT: 250-h28.core.hostnext.net Hello www.dummy.isdswat.org [5.9.80.16]250-SIZE 52428800250-LIMITS MAILMAX=1000 RCPTMAX=50000250-8BITMIME250-PIPELINING250-PIPECONNECT250-AUTH PLAIN LOGIN250 HELP
2026-04-18 10:16:26 CLIENT -> SERVER: AUTH LOGIN
2026-04-18 10:16:26 SERVER -> CLIENT: 334 VXNlcm5hbWU6
2026-04-18 10:16:26 CLIENT -> SERVER: [credentials hidden]
2026-04-18 10:16:26 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2026-04-18 10:16:26 CLIENT -> SERVER: [credentials hidden]
2026-04-18 10:16:28 SERVER -> CLIENT: 535 Incorrect authentication data
2026-04-18 10:16:28 SMTP ERROR: Password command failed: 535 Incorrect authentication data
SMTP Error: Could not authenticate.
2026-04-18 10:16:28 CLIENT -> SERVER: QUIT
2026-04-18 10:16:28 SERVER -> CLIENT: 221 h28.core.hostnext.net closing connection
SMTP Error: Could not authenticate.
Message could not be sent. Mailer Error: SMTP Error: Could not authenticate.