cURL error 35: OpenSSL SSL_connect: Connection reset by peer

  • Resolved ste9890

    (@ste9890)


    3 years, 6 months ago

    Hi there,

    We have suddenly started having a strange issue with the WP Mail SMTP Plugin.

    We are using it on many sites with Send In Blue, and on many of these sites it has stopped delivering emails. When testing, it throws the following error:

    cURL error 35: OpenSSL SSL_connect: Connection reset by peer

    We’ve raised this with our server provider who said it’s a SIB issue – we opened a ticket with SIB who have said it’s a problem with the plugin!

    When swapping out your plugin for the Post SMTP plugin (using the same Send in Blue details) the emails were delivering successfully. Which suggests that perhaps it is a potential issue with the plugin?

    We have this setup on many sites and would like to avoid having to replace your plugin en masse if possible. If there’s anything you can do to help it would be much appreciated.

    One extra piece of information is our server provider said the following:

    “Sendinblue are proxying api.sendinblue.com through Cloudflare, and Cloudflare are terminating the TCP connection”

    Again, any ideas you may have for a fix would be greatly appreciated.

    Thanks,
    Ste

Viewing 2 replies - 1 through 2 (of 2 total)

  • Hi @ste9890,

    Thanks for reaching out. Usually, this error message denotes the SSL connection error and usually happens due to an outdated cURL package or SSL protocol in your server. There can also be a firewall on your server. Your web host provider should have more information than that.

    The error message isn’t on the plugin level, but if you’re not facing an issue with Post SMTP, please follow this troubleshooting guide to isolate the issue.

    I hope this helps!

    HI @ste9890 – We haven’t heard from you in about a week, so I’m going to go ahead and mark this ticket resolved. If you still have questions, though, please feel welcome to continue the conversation.

Viewing 2 replies - 1 through 2 (of 2 total)
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