Making users to use port 587 for submission emails

[Sasa Stupar]

--On 10. september 2005 9:00 -0500 Mike Klinke <lsomike at futzin.com> wrote:

> On Saturday 10 September 2005 04:48, Sasa Stupar wrote:
>> Hi!
>>
>> I am running Sendmail 8.13.4 on FC4 with cyrus2. I have
>> configured sendmail to listen on ports 25 and 587. Since all of
>> the client mail software use port 25 by default instead of 587,
>> how do I make users to use 587 and deny access to 25? Something
>> like: when they try to connect to port 25, they get back error -
>> you are not a server so you must use port 587. Any idea?
>>
>> Regards,
>> Sasa
>
> If you don't wish to have other servers connecting to deliver mail
> to this box don't allow port 25 through the firewall and your users
> will get the hint that port 587 is required.
>
> I assume that you use port 587 for the convenience of those users
> who are roaming through ISP's that have blocked port 25.
>
> Why would you care if a roaming user connects to port 25 when
> connecting from an ISP that doesn't block port 25?
>
> Regards, Mike Klinke

Normally port 25 is used for server-to-server connection and port 587 is 
for users to submit their messages.
My ISp doesn't block port 25, but I'd like to have things like they should 
be.

Regards,
Sasa