PositiveSSL not working with Android?

Namecheap currently offers one of the most affordable ways to get a (not self-signed) SSL cert to use with your web-/mailserver – the only drawback being, that it isn’t signed by a CA Root, but through some subsidiaries, which means you’ll also have to install a supplied CA bundle on the server or else you’ll get a bunch of SSL errors.

With dovecot as POP/IMAP server, that’s actually quite easy – just put all the certs in single file, starting with your servers cert and followed by the three certs supplied by Namecheap/Comodo.

This should work fine with most mail clients, like Thunderbird or Evolution. The cert also worked with Apache for HTTPS. But for some reason, it didn’t work with my Android mail app.

Turns out, Android can be quite picky about the order of the cert chain…

If the certs are in any other order, Android threw an error. So your cert file should contain (again: in that order):

  1. Your Cert as supplied by Namecheap/Comodo/…
  2. PositiveSSLCA.crt
  3. UTNAddTrustServerCA.crt
  4. AddTrustExternalCARoot.crt

4 thoughts on “PositiveSSL not working with Android?

  1. Mine is close, but seems to have an additional cert. Tips?

    [[email protected] ~]# echo|openssl s_client -connect imap.ics-il.net:993
    CONNECTED(00000003)
    depth=4 /C=SE/O=AddTrust AB/OU=AddTrust External TTP Network/CN=AddTrust External CA Root
    verify return:1
    depth=3 /C=US/ST=UT/L=Salt Lake City/O=The USERTRUST Network/OU=http://www.usertrust.com/CN=UTN – DATACorp SGC
    verify return:1
    depth=2 /C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO Certification Authority
    verify return:1
    depth=1 /C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=EssentialSSL CA
    verify return:1
    depth=0 /OU=Domain Control Validated/OU=EssentialSSL Wildcard/CN=*.ics-il.net
    verify return:1

    Certificate chain
    0 s:/OU=Domain Control Validated/OU=EssentialSSL Wildcard/CN=*.ics-il.net
    i:/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=EssentialSSL CA
    1 s:/C=SE/O=AddTrust AB/OU=AddTrust External TTP Network/CN=AddTrust External CA Root
    i:/C=SE/O=AddTrust AB/OU=AddTrust External TTP Network/CN=AddTrust External CA Root
    2 s:/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO Certification Authority
    i:/C=US/ST=UT/L=Salt Lake City/O=The USERTRUST Network/OU=http://www.usertrust.com/CN=UTN – DATACorp SGC
    3 s:/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=EssentialSSL CA
    i:/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO Certification Authority
    4 s:/C=US/ST=UT/L=Salt Lake City/O=The USERTRUST Network/OU=http://www.usertrust.com/CN=UTN – DATACorp SGC
    i:/C=SE/O=AddTrust AB/OU=AddTrust External TTP Network/CN=AddTrust External CA Root

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