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Home/ Questions/Q 3698784
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Editorial Team
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Editorial Team
Asked: May 19, 20262026-05-19T05:01:26+00:00 2026-05-19T05:01:26+00:00

I keep getting this error in my production enviroment OpenSSL::SSL::SSLError (hostname was not match

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I keep getting this error in my production enviroment

OpenSSL::SSL::SSLError (hostname was not match with the server certificate)

I really don’t know much about certificates. I have configured rails to use sendmail. Sendmail is working well in other php applications on the server.
I use Phusion Passenger.
I also have a redmine-app which uses sendmail and also works fine (but it runs rails 2.x)
Any idea how to solve this?

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  1. Editorial Team
    Editorial Team
    2026-05-19T05:01:27+00:00Added an answer on May 19, 2026 at 5:01 am

    This means the SSL Certificate installed on the mail server did not match its hostname.

    You can disable these exceptions, but then you are vulnerable to man-in-the-middle attacks.

    The other option is to get a proper SSL Certificate (or install it correctly) for your mail server.

    For more on SSL Certs I suggest superuser.com

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