QPopper does not know how to handle chained SSL certificates. This poses a big problem when you need to use such certificates, since on every connection attempt, the user's mail client pops up a nasty security warning dialog which fears users from using SSL secured POP3.
Created attachment 78231 [details, diff] Patch adding SSL certificate chain file support to QPopper The attached patch fixes the addressed issue by replacing the SSL function which loads the certificate file. Original credits for this patch go to Pete 'Wolfy' Hanson <alaska dot wolfy at gmail dot com>, found in the qpopper mailing list. Please consider his comment in your review of the patch: > This is incomplete in that I didn't bother trying to determine if > something similar is needed for SSLPlus builds, and haven't checked to > see if this change will work with certs that don't require an > intermediate certificate. It's a "works for me" kinda deal - I hope > it helps someone else in the future.
this patch is also contained in qpopper 4.0.8 official source.
If anyone is interested in applying the patch posted above to the current QPopper version in Portage (4.0.5), please do so, otherwise change this bug's resolution to "UPSTREAM", as version 4.0.8 will contain this fix.
It seems there is no interest in having this fixed in portage, and I have switched to Courier a while ago. Setting the resolution to UPSTREAM.