Sendmail inserts host name into email addresses

[jason thompson_1]

When mail is sent from this host, the from address is correct but the return path, recieved from and other fields show @hostname.domainname. This particular system is sending through a relay host and the domain is masqeuraded. Is there a way to get sendmail to stop inserting it's hostname into the return path:, recieved from:, and other fields in a email's header?

[Geoff Wild]

Sure, just set the DM macro in sendmail.cf:

# who I masquerade as (null for no masquerading) (see also $=M)
DMyourdomain.com

Then restart sendmail...

Rgds...Geoff

[Dave La Mar]

Jason -
As Geoff stated changed the DM. In our environment we changed it to the domain name of the mail server.

Best of luck.

Regards,

dl

[jason thompson_1]

It is set, that is what I meant by the domain being masqueraded. The masquerading allows the from field to show the correct address, but there are other fields within the header that still insert the hostname.

[Geoff Wild]

Ok, are you using a "smart-relay" host?

# "Smart" relay host (may be null)
DSyourserver


Rgds...Geoff

[Dave La Mar · Accepted solution]

Another option as per Shannon (no points for plagiarism please)-

You need to change the class of server, changing the $j will not have impact on this problem.

Edit sendmail.cf (normally in /etc/mail) and search for "CE root".

Change that entry to "CM root"

This will remove the hostname.domain and replace it with simply domain.

Note: This will only change mail from the server where the change is made. Incoming mail can not have the address changed by sendmail.

Sincerely,
Shannon Petry

[Geoff Wild]

I think you need to use the m4 configuration:

FEATURE(`masquerade_envelope')

Rgds...Geoff

[Stuart Abramson_2]

vi sendmail.cf
Set:
DMdomain.com
Unset:
CE root