WP Mail SMTP Cannot connect to SMTP server

  • Resolved fibronic

    (@fibronic)


    1 year, 10 months ago

    Hi everyone,

For about a week now our website is unable to connect to several SMTP servers for sending outgoing emails. We've tried several "Other SMTP" servers without success. It has always worked before and we haven't made any changes to the website since the issue first occurred. The weird thing is that it does work with Outlook's SMTP servers: smtp-mail.outlook.com (we've tried two accounts), but Microsoft doesn't want us to use their email addresses for this and blocks the accounts.

The same issue also occurs with the plugin Easy WP SMTP, so it's pretty safe to assume your plugin is not at fault. But, we're hoping you're willing and able to provide support nevertheless.

We've tried the following to resolve the issue:
-Disabled all plugins (besides WP Mail SMTP) and activated WordPress 2023 default theme.
-Tried with several SMTP servers: smtp.hostnet.nl and mail.zxcs.nl.
-Deactivated and enabled WP Mail SMTP.
-Deleted WP Mail SMTP including its configuration and reinstalled WP Mail SMTP.

We've enabled WP_Debug, but no email-related warnings or errors can be found in the debug.log file. This is what pops up at the top of the WP Mail SMTP settings page:
"WP Mail SMTP Error:
Email Source: WPForms Lite
Mailer: other SMTP-service
SMTP Error: Could not connect to SMTP host. Failed to connect to serverSMTP server error: Failed to connect to server SMTP code: 115 Additional SMTP info: Operation now in progress"

Here are some WP Mail SMTP event logs:

Type: Error
Date: 09/01/2023 at 16:50
Content
Mailer: Other SMTP
SMTP Error: Could not connect to SMTP host. Failed to connect to serverSMTP server error: Failed to connect to server SMTP code: 115 Additional SMTP info: Operation now in progress
Source:
WP Core
/var/www/vhosts/koebruggemarkt.nl/httpdocs/wp-includes/class-wp-recovery-mode-email-service.php (line: 235)

Type: Error
Date: 09/01/2023 at 16:50
Content: 
Mailer: Other SMTP
SMTP Error: Could not connect to SMTP host. Failed to connect to serverSMTP server error: Failed to connect to server SMTP code: 115 Additional SMTP info: Operation now in progress
Source: WP Mail SMTP
/var/www/vhosts/koebruggemarkt.nl/httpdocs/wp-content/plugins/wp-mail-smtp/src/Admin/Pages/TestTab.php (line: 345)

Thank you for taking the time to help us!

Kind regards,
Fibronic




    • This topic was modified 1 year, 10 months ago by fibronic. Reason: Wasn't done with initial post, accidental submit
Viewing 3 replies - 1 through 3 (of 3 total)
  • Plugin Support Dake

    (@dakeg)

    Hi @fibronic

    Thanks for reaching out and we’re sorry to hear that you’re having issues with setting up the Other SMTP mailer.

    The “Could not connect to SMTP host. Failed to connect to serverSMTP server error: Failed to connect to server SMTP code: 115 Additional SMTP info” error indicates that your server refuses the connection and it is not able to connect to the remote mail server.

    You’ll need to contact your hosting provider with that error report to fix the server configuration or to see if anything is blocking (Firewall/ModSecurity). They should be able to resolve it for you.

    The above would likely be the ideal course of action since the issue occurs after performing several troubleshooting steps and even when using the Easy WP SMTP plugin.

    If for some reason they are unable to resolve the issue, to confirm if the issue is server specific, we would recommend trying one of our other mailers.

    If you’d like to check out more details on any of our mailers, you can find them in our complete mailer guide.

    I hope this helps! If you have any questions, could you please let me know?

    Thanks! ??

    Thread Starter fibronic

    (@fibronic)

    Hi Dake,

    We had already contacted our hosting provider several times about this and they said that nothing was wrong on their end.
    I hadn’t tried configuring a different mailer because I was pretty sure it wouldn’t make a difference. Turns out I was very wrong: emails are now being sent successfully via Sendinblue.

    Thank you for your help ??

    Kind regards,
    Fibronic

    Plugin Support Dake

    (@dakeg)

    Hi @fibronic,

    That’s great, I’m glad to hear you resolved the issue by swapping mailers. Thank you for taking the time to let us know.

    If you have any other questions, please feel welcome to reach out! ??

Viewing 3 replies - 1 through 3 (of 3 total)
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