Hello.

I am running MailCow on my server. Everything is running fine but I have a problem with the WildCard certificate.

I uploaded the certificate in *.pem format in the SSL folder.

The site + certificate work without any problem on computers.

However, when I access the MailCow server page from my android phone the page loads but there is a certificate error - the page is not trusted. When I check the certificate it is correct.

Is there any other setting applied to the mobile version as to the certificate ?

  • DocFraggle replied to this.

  • I solved the problem by converting cert, key, inmedial to pfx and then to pem. I pasted the cert.pem file into the ssl folder and now it works correctly and in the certificate test it gets status “A”

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    The test passes, although there seems to be a problem with validation.

    There are times when the certificate works on both devices, but not always.

    Seems you forgot to add the whole certificate chain to your certificate file

    I’ve only added the cert.pem and key.pem files to the ssl folder in mailcow-dockerized. Is there anything else missing? Should I create a separate folder for a given domain in the ssl folder, e.g. the domian.com folder, and put the cert.pem and key.pem in it?

      c-oolt Is there anything else missing?

      Yes. As I wrote before, you have to add all SSL chain certificates to your cert.pem file as well. Please google it if you don’t understand how it works

        I solved the problem by converting cert, key, inmedial to pfx and then to pem. I pasted the cert.pem file into the ssl folder and now it works correctly and in the certificate test it gets status “A”

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