Can’t set up plain SMTP without credentials

  • Resolved litbea

    (@litbea)


    11 hours, 7 minutes ago

    I couldn’t set up this plugin with my corporate SMTP server, which authenticates by IP address and doesn’t require entering a username or password. Even though I’ve unchecked the option for using credentials, when I try to save the configuration, it fails with a red message stating that “credentials were entered incorrectly.”

    I switched to another SMTP plugin, and it worked without issues, so I believe something isn’t working correctly in this scenario.

Viewing 1 replies (of 1 total)
  • Plugin Support Ariful Islam

    (@arifulislam1)

    8 hours, 30 minutes ago

    Hi @litbea ,

    FluentSMTP does support plain/relay SMTP without username and password. In the Other SMTP connection, please turn Authentication off, then leave the SMTP Username and SMTP Password fields empty. With Authentication disabled, FluentSMTP does not send SMTP AUTH to the mail server.

    Please also check these points:

    1. Make sure you are using the latest FluentSMTP version 2.4.0.
    2. Confirm the connection is saved with Authentication: Off.
    3. If you previously saved the connection with Authentication on, please edit it again or recreate the connection so the new setting is stored.
    4. Make sure no other SMTP/mail plugin is active, as multiple SMTP plugins can override each other.
    5. Confirm with your mail host that the website server’s public IP is allowed to relay without authentication. This is usually required for IP-based SMTP relay setups.
    6. Use the host/port/encryption combination recommended by your mail provider, commonly port 587 with TLS or port 25/587 for trusted relay setups.

    If you still see “Could not authenticate,” that usually means the SMTP server is still asking for authentication, the saved connection still has Authentication enabled, or another plugin/server-level mail configuration is interfering.

    Please share a screenshot of the FluentSMTP SMTP settings page with credentials hidden/empty, plus the exact error shown in the Email Test screen. Please do not share any password or secret key.

Viewing 1 replies (of 1 total)

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