Hi

I need to route all email via Sendmail at my Unix box through my
Exchange server, but the problem is that when the emails get relayed
they keep the machine name example. atlantis.crawford.com and some
sites do Reverse DNS on email addresses so they treat that address as
spam.

I need to find out how to stripe the machine name in sendmail so the
mail looks like @crawford.com.

Any idea how I can do that in sendmail ??

Thanks,

Bill

underh20 wrote:
> I need to route all email via Sendmail at my Unix box through my
> Exchange server, but the problem is that when the emails get relayed
> they keep the machine name example. atlantis.crawford.com and some
> sites do Reverse DNS on email addresses so they treat that address as
> spam.
>
> I need to find out how to stripe the machine name in sendmail so the
> mail looks like @crawford.com.
>
> Any idea how I can do that in sendmail ??

Those options in your .mc file should do it:

MASQUERADE_AS(`your.domain')dnl
FEATURE(`masquerade_envelope')dnl
FEATURE(`allmasquerade')dnl
FEATURE(`always_add_domain')dnl

The details are there:
http://www.sendmail.org/m4/features.html

Laurent

[keeping the reply on Usenet too]

underh20 wrote:
> Hi Laurent,
>
> Thanks much for your reply.
>
> What is the command to copy the mc file over as the cf? Should I do
> this.

Basically, for Solaris (it's different with Sendmail.org sendmail, and probably
on other Unix flavours as well):

- Go in /usr/lib/mail/cf

- Make a backup copy of main.mc
(Actually, I copy the whole /usr/lib/mail/cf to someplace else to keep the
original clean)

- Edit main.mc and add the lines, it'll look like this:

divert(0)dnl
VERSIONID(`@(#)main.mc 1.5 (Sun) 08/10/00')
OSTYPE(`solaris8')dnl
DOMAIN(`solaris-generic')dnl
MASQUERADE_AS(`your.domain')dnl
FEATURE(`masquerade_envelope')dnl
FEATURE(`allmasquerade')dnl
FEATURE(`always_add_domain')dnl
MAILER(`local')dnl
MAILER(`smtp')dnl

- Build the .cf file:
# /usr/ccs/bin/make main.cf
test ! -f main.cf || /usr/bin/mv main.cf main.cf.prev
/usr/ccs/bin/m4 ../m4/cf.m4 main.mc > main.cf

- Diff it with your cuttent sendmail.cf to have a general idea of the changes
(some obvious errors are avoided that way):
# diff main.cf /etc/mail/sendmail.cf

- Make a backup of your current /etc/mail/sendmail.cf in case you want to roll
it back quickly

- Copy your new main.cf to /etc/mail/sendmail.cf

- Restart sendmail

- Look carefully at the logs to check it's not rejecting anything it should
accept.

HTH,

Laurent