Automatic email relay agent?

[jdow]

From: "Hongwei Li" <hongwei at wustl.edu>

>> probably the best way to handle the "travelling user" need is with
>> smtp-auth -- where the sending client authenticates.
>>
>> look at/for the following lines in your sendmail.mc
>>
>>
>> dnl # The following causes sendmail to additionally listen to port
>> 587 for
>> dnl # mail from MUAs that authenticate. Roaming users who can't reach
>> their
>> dnl # preferred sendmail daemon due to port 25 being blocked or
>> redirected find
>> dnl # this useful.
>>
>>
>> the concept of temporarily adding a random/dynamic ipnumber isn't
>> very good as it open a (admittedly probably small) window that might
>> be able to be used by a spammer type should they come upon it.
>>
> 
> Thank you very much for the help!  I uncomment the line
> 
> DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl
> 
> but, I have a question: if outlook express does not use port 587, then what to
> do?  How to make sure that if outlook express finds port 25 blocked, it will
> try port 587?

The question is mooted. Outlook Express can set to port 587 or any other
port you want. (I experimented with an offbeat port at one time just to
check this.)

{^_^}