LOG EMAIL SEND

Versions:
WordPress: 6.7.2
WordPress MS: No
PHP: 7.4.33
WP Mail SMTP: 4.4.0

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: Could not authenticate.
Host: mail.medicover.pl
Port: 465
SMTPSecure: ssl
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)
SMTPOptions: {"ssl":{"verify_peer":false,"verify_peer_name":false,"allow_self_signed":true}}

Server:
OpenSSL: OpenSSL 1.1.1k FIPS 25 Mar 2021
Apache.mod_security: No

Debug:
Email Source: WP Mail SMTP
Mailer: Other SMTP
SMTP Error: Could not authenticate.

SMTP Debug:
2025-03-11 12:25:12 Connection: opening to ssl://mail.medicover.pl:465, timeout=5, options=array ( 'ssl' => array ( 'verify_peer' => false, 'verify_peer_name' => false, 'allow_self_signed' => true, ),)

2025-03-11 12:25:12 Connection: opened

2025-03-11 12:25:12 SERVER -> CLIENT: 220-mx.synevo.md ESMTP Exim 4.98.1 #2 Tue, 11 Mar 2025 14:25:12 +0200 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.

2025-03-11 12:25:12 CLIENT -> SERVER: EHLO synevo.md

2025-03-11 12:25:12 SERVER -> CLIENT: 250-mx.synevo.md Hello synevo.md [194.33.40.184]250-SIZE 52428800250-LIMITS MAILMAX=1000 RCPTMAX=50000250-8BITMIME250-PIPELINING250-PIPECONNECT250-AUTH PLAIN LOGIN250 HELP

2025-03-11 12:25:12 CLIENT -> SERVER: AUTH LOGIN

2025-03-11 12:25:12 SERVER -> CLIENT: 334 VXNlcm5hbWU6

2025-03-11 12:25:12 CLIENT -> SERVER: [credentials hidden]

2025-03-11 12:25:12 SERVER -> CLIENT: 334 UGFzc3dvcmQ6

2025-03-11 12:25:12 CLIENT -> SERVER: [credentials hidden]

2025-03-11 12:25:14 SERVER -> CLIENT: 535 Incorrect authentication data

2025-03-11 12:25:14 SMTP ERROR: Password command failed: 535 Incorrect authentication data

SMTP Error: Could not authenticate.

2025-03-11 12:25:14 CLIENT -> SERVER: QUIT

2025-03-11 12:25:14 SERVER -> CLIENT: 221 mx.synevo.md closing connection

2025-03-11 12:25:14 Connection: closed

SMTP Error: Could not authenticate.