Error: Could not connect to SMTP host

  • Resolved rikah

    (@rikah)


    2 years, 2 months ago

    Hello! The plugin was working smoothly, but since september 20th my e-mails are not being sent from my woocommerce website. I didn’t do any changes, checked all configurations and contacted my host for any issues and firewalls and there’s no problem at all from their part, wich leaves me to think there’s something wrong with the plugin. Help? Me and all my customers aren’t receiving e-mails. ??

Viewing 7 replies - 1 through 7 (of 7 total)
  • Plugin Support Darshana

    (@darshanaw)

    Hi @rikah,

    Thanks for reaching out! Could you please go to WP Mail SMTP -> Tools -> Debug Events section and check if you see any errors.

    Based on the error report(s), you should be able to identify the issue.

    I hope this helps. Thanks!

    Thread Starter rikah

    (@rikah)

    Hello, Darshana!
    The error is exactly the title of the topic “Error: Could not connect to SMTP host”.

    I did some tests and it seems it’s not the plugins fault, it works just fine if I use other mailer. But still the host service isn’t finding any solutions, they keep telling me there’s nothing they can do to fix it. We’ve tried all combinations of configurations, changed dns, etc.

    I get same thing, was working until recentely. It gives ssl error, I use Letsencrypt and cyberpanel, renewed certsw but still same

    `Versions:
    WordPress: 6.0.2
    WordPress MS: No
    PHP: 7.4.30
    WP Mail SMTP: 3.5.2

    Params:
    Mailer: smtp
    Constants: No
    ErrorInfo: SMTP Error: Could not connect to SMTP host. Connection failed. stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages:
    error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed
    Host: mail.siambuds.com
    Port: 25
    SMTPSecure: string(0) “”
    SMTPAutoTLS: bool(true)
    SMTPAuth: bool(true)

    Server:
    OpenSSL: OpenSSL 1.1.1f 31 Mar 2020
    Apache.mod_security: No

    Debug:
    Email Source: WP Mail SMTP
    Mailer: Other SMTP
    SMTP Error: Could not connect to SMTP host. Connection failed. stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages:
    error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed

    SMTP Debug:
    2022-09-27 11:05:41 Connection: opening to mail.siambuds.com:25, timeout=300, options=array()

    2022-09-27 11:05:41 Connection: opened

    2022-09-27 11:05:41 SERVER -> CLIENT: 220 mail.siambuds.com ESMTP Postfix

    2022-09-27 11:05:41 CLIENT -> SERVER: EHLO siambuds.com

    2022-09-27 11:05:41 SERVER -> CLIENT: 250-mail.siambuds.com250-PIPELINING250-SIZE 30720000250-ETRN250-STARTTLS250-AUTH PLAIN250-AUTH=PLAIN250-ENHANCEDSTATUSCODES250-8BITMIME250-DSN250 CHUNKING

    2022-09-27 11:05:41 CLIENT -> SERVER: STARTTLS

    2022-09-27 11:05:41 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS

    2022-09-27 11:05:41 Connection failed. Error #2: stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed [/home/siambuds.com/public_html/wp-includes/PHPMailer/SMTP.php line 468]

    SMTP Error: Could not connect to SMTP host. Connection failed. stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed

    2022-09-27 11:05:41 CLIENT -> SERVER: QUIT

    2022-09-27 11:05:41

    2022-09-27 11:05:41

    2022-09-27 11:05:41 Connection: closed

    SMTP Error: Could not connect to SMTP host. Connection failed. stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed`

    Mozilla pc client and webmail works fine, so must be script

    • This reply was modified 2 years, 1 month ago by mataleo.
    Plugin Support Darshana

    (@darshanaw)

    Hi @rikah,

    The error “could not connect to SMTP host” generally indicates that your web server isn’t able to connect to the SMTP server. There could be a firewall between your web server and the SMTP server or something similar.

    If your hosting support cannot find the exact cause, you can try configuring an alternative mailer.

    I hope this helps. Thanks!

    Plugin Support Darshana

    (@darshanaw)

    Hi @mataleo,

    Your issue seems to be related to CyberPanel SSL/domain. Please check this community thread to find out more information.

    I hope this helps. Thanks!

    I have the same problem. Could you help with this please?
    My debug output shows the following:

    WP Mail SMTP
/home/brollandm/go-mentor.com/wp-content/plugins/wp-mail-smtp/src/Admin/Pages/TestTab.php (line: 314)

Backtrace:
[0] wp_mail called at [/home/brollandm/go-mentor.com/wp-content/plugins/wp-mail-smtp/src/Admin/Pages/TestTab.php:314]
[1] WPMailSMTP\Admin\Pages\TestTab->process_post called at [/home/hollandm/go-atlas.com/wp-content/plugins/wp-mail-smtp/src/Admin/ParentPageAbstract.php:265]
[2] WPMailSMTP\Admin\ParentPageAbstract->process_actions called at [/home/hollandm/go-atlas.com/wp-includes/class-wp-hook.php:307]
[3] WP_Hook->apply_filters called at [/home/hollandm/go-atlas.com/wp-includes/class-wp-hook.php:331]
[4] WP_Hook->do_action called at [/home/brollandm/go-mentor.com/wp-includes/plugin.php:476]
[5] do_action called at [/home/brollandm/go-mentor.com/wp-admin/admin.php:175]

    I have contacted the hosts 123reg and they tell me there is firewall blocking the emails.

Viewing 7 replies - 1 through 7 (of 7 total)
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