Replies: 0
Hi,
I’m trying to set up WP Mail SMTP with a new SMTP server and keep getting authentication failure. I contacted the sysadmin and he said the following:
It is trying to use CRAM authentication, which won’t work. You need to use either PLAIN or LOGIN.
Is there a way to set the type of authentication? Here is the full error log:
Versions:
WordPress: 5.8.1
WordPress MS: No
PHP: 7.4.23
WP Mail SMTP: 3.0.3
Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: Could not authenticate.
Host: ***ipp.com
Port: 587
SMTPSecure: tls
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)
Server:
OpenSSL: OpenSSL 1.1.0l 10 Sep 2019
Debug:
Email Source: WP Mail SMTP
Mailer: Other SMTP
SMTP Error: Could not authenticate.
SMTP Debug:
2021-09-21 15:45:45 Connection: opening to ***ipp.com:587, timeout=300, options=array()
2021-09-21 15:45:46 Connection: opened
2021-09-21 15:45:46 SERVER -> CLIENT: 220 allegro.isipp.com ESMTP Sendmail 8.15.2/8.15.2/Debian-8+deb9u1; Tue, 21 Sep 2021 15:45:46 GMT; (No UCE/UBE) logging access from: [x.x.x.x](FORGED)-x.x.x.x.vultr.com [x.x.x.x.x] (may be forged)
2021-09-21 15:45:46 CLIENT -> SERVER: EHLO ***.com
2021-09-21 15:45:46 SERVER -> CLIENT: 250-***ipp.com Hello 216.128.149.225.vultr.com [216.128.149.225] (may be forged), pleased to meet you250-ENHANCEDSTATUSCODES250-PIPELINING250-EXPN250-VERB250-8BITMIME250-SIZE250-DSN250-AUTH DIGEST-MD5 CRAM-MD5250-STARTTLS250-DELIVERBY250 HELP
2021-09-21 15:45:46 CLIENT -> SERVER: STARTTLS
2021-09-21 15:45:46 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS
2021-09-21 15:45:46 CLIENT -> SERVER: EHLO ***.com
2021-09-21 15:45:46 SERVER -> CLIENT: 250-***ipp.com Hello x.x.x.x.vultr.com [216.128.149.225] (may be forged), pleased to meet you250-ENHANCEDSTATUSCODES250-PIPELINING250-EXPN250-VERB250-8BITMIME250-SIZE250-DSN250-AUTH DIGEST-MD5 CRAM-MD5 LOGIN PLAIN250-DELIVERBY250 HELP
2021-09-21 15:45:46 CLIENT -> SERVER: AUTH CRAM-MD5
2021-09-21 15:45:46 SERVER -> CLIENT: 334 PDE1NTg5NDg4NDcuNDg0OTI5MUBhbGxlZ3JvLmlzaXBwLmNvbT4=
2021-09-21 15:45:46 CLIENT -> SERVER: [credentials hidden]
2021-09-21 15:45:46 SERVER -> CLIENT: 535 5.7.0 authentication failed
2021-09-21 15:45:46 SMTP ERROR: Username command failed: 535 5.7.0 authentication failed
SMTP Error: Could not authenticate.
2021-09-21 15:45:46 CLIENT -> SERVER: QUIT
2021-09-21 15:45:46 SERVER -> CLIENT: 221 2.0.0 ***ipp.com closing connection
2021-09-21 15:45:46 Connection: closed
SMTP Error: Could not authenticate.Cheers,
Vinny