On Mon, 21 Aug 2017 11:04:40 +0100, Sebastian Arcus stated:
On 21/08/17 10:37, Gedalya wrote:
is there a 'preferred way'? should I tell users to use 143 over 993 ? or 993 over 143? or?
There is no concrete answer. There are various opinions and feelings aboutOn 08/21/2017 07:28 AM, voytek@sbt.net.au wrote:
this. The opinion againt 993/995 is that these are not standard ports,Out of curiosity, is there a source for this? It's the first time I hear that 993/995 are not standard ports - and searching on the Internet, I can't find any evidence to back it up? Also, pretty much all email software has been using them for the past 20 years or so. It seems like a curiously high rate of adoption for a non-standard :-)
One of the places I have found extremely useful over the years is: https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
It lists the port number, TCP & UDP, description and IANA Status. It also lists multiple use ports; such as 465.
Port TCP UDP Description IANA status
143 TCP Assigned Internet Message Access Protocol (IMAP) management Official
465 TCP URL Rendezvous Directory for SSM (Cisco protocol) Official 465 TCP Authenticated SMTP over TLS/SSL (SMTPS) Unofficial
993 TCP Assigned Internet Message Access Protocol over TLS/SSL (IMAPS) Official 995 TCP UDP Post Office Protocol 3 over TLS/SSL (POP3S) Official
-- Jerry