Re: Changing SendMail Port Number

2004-06-06 Thread T Kellers
On Saturday 05 June 2004 08:32 pm, Scott Kupferschmidt wrote:
 The only problem with listening on port 24 is no one is going to be able
 to send mail to you, as smtp listens on port 25.

 Sincerely,

 Scott Kupferschmidt
 ISPrime, Inc.
 866.502.4678 ext. 3
 AIM: Scott ISPrime - ICQ: 174337249

 On Sat, 5 Jun 2004, Doug Hardie wrote:
  On Jun 5, 2004, at 16:49, Gerard Seibert wrote:
   This is probably a stupid question, but how do I change the SMTP port
   number that SendMail listens in on? I want to change it to something
   else, like perhaps 24. My ISP is blocking 25 and I want to get around
   that problem.
 
  I use the following in the mc file:
 
  DAEMON_OPTIONS(`Port=25, Name=MTA')dnl
  DAEMON_OPTIONS(`Port=26, Name=MTA')dnl
 
 
  It responds to both ports 25 and 26.
 

http://www.dyndns.org/

Check the MailHop Relay  Product.

For a fee (about $30/year) they provide an service that will handle your MX 
records and forward them to your server on your own selected port.

I use port 24 and it works like a charm.

Tim Kellers
CPE/NJIT

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Re: Changing SendMail Port Number

2004-06-06 Thread Doug Hardie
On Jun 5, 2004, at 17:35, Mark wrote:
Gerard Seibert wrote:
This is probably a stupid question, but how do I change the SMTP port
number that SendMail listens in on? I want to change it to something
else, like perhaps 24. My ISP is blocking 25 and I want to get around
that problem.
And how will clients (the world) find you then, on port 24?
Besides, are you sure your ISP blocks *incoming* port 25? That is 
somewhat
unusual; *outgoing* 25, yes (for dialup users), but incoming? 
Regardless,
same difference: you can start sending on port 24, but since the world 
is
listening on port 25, that will do you little good.
There are ISPs out there that block port 25 to any destination other 
than their mail server.  If you are connected to one of them there is 
no way to access your ISP's mail server.  Thats why we provide support 
for both ports 25 and 26.  I have never seen port 26 blocked.  Almost 
all mail clients provide the ability to change the port it uses.  We 
provide instructions to our users on how to make that change if they 
need it sl that they can send mail through our server.  We do require 
the use of SMTP-AUTH to avoid an open relay.  Blocking port 25 is an 
attempt to prevent the use of open relays.

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RE: Changing SendMail Port Number

2004-06-06 Thread JJB

Port 25 is the world wide internet standard for smtp mail servers to
listen on for inbound mail. There is no problem of changing your
smtp email server to listen on port 24, except for the fact that no
body on the internet can reach your smtp email server because they
will be sending to port 25 which your ISP has blocked and you are
not listening on. So for all practical purposes it does nothing for
you.

Last year I read that zoneedit was developing an port 25 redirect as
an companion to their port 80 redirect.

Check out www.zoneedit.com   to see if it's available yet.  Besides
ISP blocking port 25, port 80 is also blocked for the same reasons.
Once you sign up for the free zoneedit service all your domain name
driven traffic passes through zoneedit. You can configure your
zoneedit account to redirect port 80 to say port 8080 and then
config your web server to listen on port 8080 and you bypass your
ISP's block. If zoneedit has it's port 25 redirect available it will
allow you to do same thing.

Check it out and the other free zoneedit like companies out there.
One of then may have port 25 redirect working. If you find any
please report back to this thread for the archives.


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Doug Hardie
Sent: Sunday, June 06, 2004 12:29 PM
To: Mark
Cc: Gerard Seibert; freebsd-questions
Subject: Re: Changing SendMail Port Number


On Jun 5, 2004, at 17:35, Mark wrote:

 Gerard Seibert wrote:

 This is probably a stupid question, but how do I change the SMTP
port
 number that SendMail listens in on? I want to change it to
something
 else, like perhaps 24. My ISP is blocking 25 and I want to get
around
 that problem.

 And how will clients (the world) find you then, on port 24?

 Besides, are you sure your ISP blocks *incoming* port 25? That is
 somewhat
 unusual; *outgoing* 25, yes (for dialup users), but incoming?
 Regardless,
 same difference: you can start sending on port 24, but since the
world
 is
 listening on port 25, that will do you little good.

There are ISPs out there that block port 25 to any destination other
than their mail server.  If you are connected to one of them there
is
no way to access your ISP's mail server.  Thats why we provide
support
for both ports 25 and 26.  I have never seen port 26 blocked.
Almost
all mail clients provide the ability to change the port it uses.  We
provide instructions to our users on how to make that change if they
need it sl that they can send mail through our server.  We do
require
the use of SMTP-AUTH to avoid an open relay.  Blocking port 25 is an
attempt to prevent the use of open relays.

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Re: Changing SendMail Port Number

2004-06-06 Thread Thomas Farrell
The answer to your question is:
/etc/mail/sendmail.cf
change this option  restart sendmail
O DaemonPortOptions=Port=25

- Original Message -
From: Gerard Seibert [EMAIL PROTECTED]
To: freebsd-questions [EMAIL PROTECTED]
Sent: Saturday, June 05, 2004 7:49 PM
Subject: Changing SendMail Port Number


 This is probably a stupid question, but how do I change the SMTP port
 number that SendMail listens in on? I want to change it to something else,
 like perhaps 24. My ISP is blocking 25 and I want to get around that
 problem.

 Thanks!

 Gerard Seibert
 [EMAIL PROTECTED]

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Re: Changing SendMail Port Number

2004-06-05 Thread Doug Hardie
On Jun 5, 2004, at 16:49, Gerard Seibert wrote:
This is probably a stupid question, but how do I change the SMTP port 
number that SendMail listens in on? I want to change it to something 
else, like perhaps 24. My ISP is blocking 25 and I want to get around 
that problem.
I use the following in the mc file:
DAEMON_OPTIONS(`Port=25, Name=MTA')dnl
DAEMON_OPTIONS(`Port=26, Name=MTA')dnl
It responds to both ports 25 and 26.
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Re: Changing SendMail Port Number

2004-06-05 Thread Scott Kupferschmidt
The only problem with listening on port 24 is no one is going to be able
to send mail to you, as smtp listens on port 25.

Sincerely,

Scott Kupferschmidt
ISPrime, Inc.
866.502.4678 ext. 3
AIM: Scott ISPrime - ICQ: 174337249

On Sat, 5 Jun 2004, Doug Hardie wrote:

 
 On Jun 5, 2004, at 16:49, Gerard Seibert wrote:
 
  This is probably a stupid question, but how do I change the SMTP port 
  number that SendMail listens in on? I want to change it to something 
  else, like perhaps 24. My ISP is blocking 25 and I want to get around 
  that problem.
 
 I use the following in the mc file:
 
 DAEMON_OPTIONS(`Port=25, Name=MTA')dnl
 DAEMON_OPTIONS(`Port=26, Name=MTA')dnl
 
 
 It responds to both ports 25 and 26.
 
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Re: Changing SendMail Port Number

2004-06-05 Thread Mark
Gerard Seibert wrote:

 This is probably a stupid question, but how do I change the SMTP port
 number that SendMail listens in on? I want to change it to something
 else, like perhaps 24. My ISP is blocking 25 and I want to get around
 that problem.

And how will clients (the world) find you then, on port 24?

Besides, are you sure your ISP blocks *incoming* port 25? That is somewhat
unusual; *outgoing* 25, yes (for dialup users), but incoming? Regardless,
same difference: you can start sending on port 24, but since the world is
listening on port 25, that will do you little good.

- Mark

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