There was an unexpected problem communicating with SMTP: Unexpected return code - Expected: 235, Got: 535 | 535 Incorrect authentication data

SMTP log:

Set: the server
Set: the auth
Set: a message will be sent
Connecting to mail.afriticgroup.com at 587
Got: 220-bh-ht-18.webhostbox.net ESMTP Exim 4.98.1 #2 Sat, 13 Dec 2025 13:39:10 +0530
Got: 220-We do not authorize the use of this system to transport unsolicited,
Got: 220 and/or bulk e-mail.
Sent: EHLO [10.1.70.8]
Got: 250-bh-ht-18.webhostbox.net Hello [10.1.70.8] [71.168.64.115]
Got: 250-SIZE 52428800
Got: 250-LIMITS MAILMAX=50 RCPTMAX=50000
Got: 250-8BITMIME
Got: 250-PIPELINING
Got: 250-PIPECONNECT
Got: 250-AUTH PLAIN LOGIN
Got: 250-STARTTLS
Got: 250 HELP
Sent: STARTTLS
Got: 220 TLS go ahead
Sent: EHLO [10.1.70.8]
Got: 250-bh-ht-18.webhostbox.net Hello [10.1.70.8] [71.168.64.115]
Got: 250-SIZE 52428800
Got: 250-LIMITS MAILMAX=50 RCPTMAX=50000
Got: 250-8BITMIME
Got: 250-PIPELINING
Got: 250-PIPECONNECT
Got: 250-AUTH PLAIN LOGIN
Got: 250 HELP
Sent: AUTH LOGIN
Got: 334 VXNlcm5hbWU6
Sent: bG9nQGFmcml0aWNncm91cC5jb20=
Got: 334 UGFzc3dvcmQ6
Sent: Z2IxNmF4d2gzbHRuS0ZPM1lwR2hvZEFrSWtQeGtnU0I=
Got: 535 Incorrect authentication data

Above may contain passwords - do not post online!

kb:virtualization:proxmox_ve

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