Craig.

-----Original Message----- From: IMail_Forum-owner@list.ipswitch.com [mailto:IMail_Forum-owner@list.ipswitch.com]On Behalf Of John Cesta - Lists Sent: Monday, March 26, 2001 4:12 PM To: IMail_Forum@list.ipswitch.com Subject: RE: [IMail Forum] Out at sea...cannot find a port!

> You do *NOT* need ports greater than or equal to 1024 open > (except for the ones you want, such as 8383 for web messaging), > unless you have a really dumb firewall. > > When IMail accepts an incoming SMTP connection, the local port is > 25, and the remote port is something typically greater than 1024. > When IMail makes an outgoing SMTP connection, it uses a port > greater than 1024, but connects to port 25. Whether the mail is > incoming or outgoing, it is using port 25. The firewall will see > the port 25 and accept the connection, regardless of which > ephermeral port (>=1024) is used.

I guess I don't completely understnd then why imail wouldn't or couldn't send mail when we locked out ports in the control panel > network > tcpip > advanced > enable security area. We kept open what we needed to provide:

web dns ftp and all the ports that Ipswitch's article defined as below.

When we re-enabled all the ports again imail worked fine.

Don't know what port it was looking for but these ports were open as well:

Answer/Solution: IMail uses the following TCP ports:

SMTP - 25 Password - 106 POP3 - 110 IMAP4 - 143 LDAP - 389 Web Administration - 8181 (default, configurable) Web Messaging - 8383 (default, configurable)

John

> -----Original Message----- > From: IMail_Forum-owner@list.ipswitch.com > [mailto:IMail_Forum-owner@list.ipswitch.com]On Behalf Of Scott Perry > Sent: Monday, March 26, 2001 2:21 PM > To: IMail_Forum@list.ipswitch.com > Subject: RE: [IMail Forum] Out at sea...cannot find a port! > > > >> gotta open tcp ports > 1024 for sending mail > > > >Do you mean *just* port 1024 or all ports greater than 1024? > > > >This port we did not have open. We have the standard ports open for: > > You do *NOT* need ports greater than or equal to 1024 open > (except for the ones you want, such as 8383 for web messaging), > unless you have a really dumb firewall. > > When IMail accepts an incoming SMTP connection, the local port is > 25, and the remote port is something typically greater than 1024. > When IMail makes an outgoing SMTP connection, it uses a port > greater than 1024, but connects to port 25. Whether the mail is > incoming or outgoing, it is using port 25. The firewall will see > the port 25 and accept the connection, regardless of which > ephermeral port (>=1024) is used. > > > -- > -Scott > > Declude: Anti-virus and Anti-spam solutions for IMail. > http://www.declude.com > -- > > > > > > >