On Thu, 10 Nov 2011 19:28:55 +0000 Dick Middleton wrote: > On 11/10/11 19:17, Carlos Mennens wrote: > > I asked a user today to make sure his incoming and outgoing email was > > using TLS. He told me it wasn't possible because my Dovecot / Postfix > > daemons were only listening on TCP 25 & 143 according to a port scan > > he did. He told me the only way I could enable encrypted secure > > sessions between the client & server is to enable port 993 (IMAPs). > > Yes you are right. Port 993 is for IMAPS (SSH). TLS is normally on the same > port as plain. > > The difference between SSH and TLS is that with SSH the encryption is set up > before any application communication takes place. i.e all application packets > are contained in the encrypted payload. With TLS the application starts > communication and then the application sets up encryption of its payload.
:%s/SSH/SSL/g --Frank
