Error: Could not authenticate.

  • Resolved lordsnake

    (@lordsnake)


    1 year, 5 months ago

    I am suddenly not able to send emails for some reason from one of my sites.
    I have even reset the smtp credentials as well, but still no joy.
    mailersend have confirmed there is no issue at their end and the credentials work fine.

    any idea what is wrong?

    Versions:
    WordPress: 6.2.2
    WordPress MS: No
    PHP: 7.4.33
    WP Mail SMTP: 3.7.0

    Params:
    Mailer: smtp
    Constants: No
    ErrorInfo: SMTP Error: Could not authenticate.
    Host: smtp.mailersend.net
    Port: 587
    SMTPSecure: tls
    SMTPAutoTLS: bool(true)
    SMTPAuth: bool(true)

    Server:
    OpenSSL: OpenSSL 1.1.1p 21 Jun 2022
    Apache.mod_security: No

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

    SMTP Debug:
    2023-06-14 18:32:38 Connection: opening to smtp.mailersend.net:587, timeout=300, options=array()

    2023-06-14 18:32:38 Connection: opened

    2023-06-14 18:32:39 SERVER -> CLIENT: 220 smtp.mailersend.net ESMTP

    2023-06-14 18:32:39 CLIENT -> SERVER: EHLO managedwp.uk

    2023-06-14 18:32:39 SERVER -> CLIENT: 250-smtp.mailersend.net Nice to meet you, grh34.myukcloud.com250-PIPELINING250-8BITMIME250-SMTPUTF8250-AUTH LOGIN PLAIN250 STARTTLS

    2023-06-14 18:32:39 CLIENT -> SERVER: STARTTLS

    2023-06-14 18:32:39 SERVER -> CLIENT: 220 Ready to start TLS

    2023-06-14 18:32:39 CLIENT -> SERVER: EHLO managedwp.uk

    2023-06-14 18:32:39 SERVER -> CLIENT: 250-smtp.mailersend.net Nice to meet you, grh34.myukcloud.com250-PIPELINING250-8BITMIME250-SMTPUTF8250 AUTH LOGIN PLAIN

    2023-06-14 18:32:39 CLIENT -> SERVER: AUTH LOGIN

    2023-06-14 18:32:39 SERVER -> CLIENT: 334 VXNlcm5hbWU6

    2023-06-14 18:32:39 CLIENT -> SERVER: [credentials hidden]

    2023-06-14 18:32:39 SERVER -> CLIENT: 334 UGFzc3dvcmQ6

    2023-06-14 18:32:39 CLIENT -> SERVER: [credentials hidden]

    2023-06-14 18:32:39 SERVER -> CLIENT: 535 Authentication failed.

    2023-06-14 18:32:39 SMTP ERROR: Password command failed: 535 Authentication failed.

    SMTP Error: Could not authenticate.

    2023-06-14 18:32:39 CLIENT -> SERVER: QUIT

    2023-06-14 18:32:39 SERVER -> CLIENT: 221 Bye

    2023-06-14 18:32:39 Connection: closed

    SMTP Error: Could not authenticate.

Viewing 1 replies (of 1 total)
  • Plugin Support Victoria Sakal

    (@sakalvictoria)

    Hi, @lordsnake!

    Thanks for reaching out!

    This error (“SMTP ERROR: Password command failed: 535 Authentication failed.“) typically means that the SMTP password is incorrect. And because of this, the SMTP server you’re trying to connect to is rejecting it.

    Please, double-check once more the password you’re using with the SMTP connection to be sure it’s correct.

    Also please know, that the Other SMTP mailer option does not use a dedicated API, which can lead to potential errors based on your website hosting/SMTP settings. In cases where ongoing issues arise while using the Other SMTP mailer, we generally recommend switching to a transactional mailer option (it’s all mailers except the Other SMTP and Default (none) option).

    WP Mail SMTP has documentation on setting up each of the available mailers here.

    Kind regards

Viewing 1 replies (of 1 total)
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