sendmail/mail/Mail

[John Summerfield]

Les Mikesell wrote:
> John Summerfield wrote:

>>
>> fff.example.com resolves to your client's IP address
>> sendmail (or other MTA) thinks it's called fff.example.com
>> then all will be well.
>>
>> In practice, it doesn't matter what the name is so long as it 
>> resolves, but it would be a bit rude to pinch IBM's.
>>
>> In sendmail (and probably other MTA) you can also use address 
>> rewriting (masquerading). See DM in sendmail.cf
> 
> You probably don't want to touch sendmail.cf (or even try to read 
> it...).  Instead, be sure you have the sendmail-cf package installed, 
> edit /etc/mail/sendmail.mc, and change
> dnl MASQUERADE_AS(`mydomain.com')dnl
> removing the leading dnl and replacing mydomain.com with something that 
> is internet-legal.  If your software runs as root when it sends mail, 
> you'll also need to add a leading dnl to the line:
> EXPOSED_USER(`root')dnl
> to comment it out.  Then restart sendmail.
> 

I can never remember that new-fangled way; what I said is what I used to 
do on OS/2. These days, I use postfix which is much more straightforward.


Thanks Les for setting the record a little straighter.