Dne �t 24. ledna 2017 Leslie Turriff napsal(a):
> 	Since migrating from my dying laptop to my new desktop machine, kmail
> refuses to send mail to my mail provider's servers, forcing me to use
> their webmail interface (yuk).  I have tinkered with the kmail
> configuration to no avail, and I've even tried copying the old kmailrc
> file over the new; but nothing works. Currently, when I attempt to
> upload mail, I see this message in the status area:
>
> "Unrecognized transport protocol. Unable to send message."
>
> During my struggles, I also saw, in a separate window, the attached
> security failure message. I have also attached snapshots of my SMTP
> configuration, and this link points to setup instructions for my mail
> provider's SMTP server:
>
> http://email.about.com/od/Accessing-Mail-com/f/Mail-com-SMTP-Server-Set
>tings.htm
>
> 	Neither of these messages gives me enough detail about the problem to
> know how to proceed.  I suspect something is corrupted in the kmail
> config, but deleting and replacing the Sending entry hasn't helped, nor
> has replacing the entire file with the working one from the old
> machine. mail.com has suggested that I change from using pop3 to imap
> (like that would help), and
>
> > Please be advised to correct your server setting by using the
> > information below:
> >
> > For IMAP Server:
> >
> > Incoming:
> > [snip]
> > Outgoing:
> > Server: smtp.mail.com
> > Port: 587
> > Encryption: STARTTLS
> >
> > If "STARTTLS" is not available, please use the protocol "TLS". If
> > this option is also not available simply activate "Encryption".
>
> which has not helped.  Using kmail's "Check what the server supports"
> sets TLS and PLAIN.  I'm guessing that TLS = STARTTLS, and SSH =
> Encryption.  The config on my old system has SSH and PLAIN set. 
> Neither of these works on my new system. Any suggestions are welcome.
>
> Leslie

The correct combinations should be:

port 25 + TLS
port 465 + SSL
port 587 + TLS

Cheers
-- 
Sl�vek