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Full Discussion: Alternative to Port 25
Special Forums IP Networking Alternative to Port 25 Post 302306816 by sdotsen on Monday 13th of April 2009 11:21:40 PM
Old 04-14-2009
Alternative to Port 25

We're in the process of testing a mail server that we hope will replace our current one that's being hosted by our ISP. We learned a few things along the way and would like to avoid them if possible. The biggest hurdle is getting around port 25 (SMTP). Our work force is approx 75% consultants who work from clients' sites. Many of these places block port 25, therefore our users can't connect to send emails.

I know it varies from site to site depending on what their IT dept puts in place, but is there a range of port that's safe to use? I know comcast blocks port 25 but I read there's a workaround with using port 587 to get around this. For those who have dealt with this, what solution did you come up with?
 

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efax-gtk-socket-client(1)				      General Commands Manual					 efax-gtk-socket-client(1)

NAME
efax-gtk-socket-client - a client of efax-gtk to work with lpd/lprng SYNOPSIS
efax-gtk-socket-client [hostname] [port] DESCRIPTION
This program enables lpd/lprng to access the efax-gtk socket server. Meaning the user can send faxes to a printer, which will ack as a fax. It takes two arguments - first a hostname to connect to, and secondly a port number at that hostname to connect to. All efax-gtk-socket- client does is to read from standard input (in this case from lpd/lprng) and passes it to a socket at the hostname and port number passed as arguments to it (namely the hostname of the computer efax-gtk is running on - normally you would specify localhost - and the port number of the socket). fax: :sd=/var/spool/fax: :mx#0: :sh: :lp=/dev/null: :if=/var/spool/fax/efax-gtk-faxfilter: This will cause a printer by the name of "fax" to be available, which (if printed to) will send the file to the efax-gtk socket server. If you set efax-gtk to listen on a port other than port 9900, you will need to amend the file /var/spool/fax/efax-gtk-faxfilter by hand to specify the correct port number on which efax-gtk is listening. Don't forget to restart the lpd printer daemon after amending /etc/printcap. OPTIONS
[ hostname ] - The name of the host to listen to. Usually should be locahlhost. [ port ] - the port number to listen to on the [ hostname ]. SEE ALSO
efax(1), efax-gtk(1). AUTHOR
efax-gtk-socket-client was written by Chris Vine <chris@cvine.freeserve.co.uk>. This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others). July 18, 2006 efax-gtk-socket-client(1)
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