a (probably breathtakingly stupid) mta question

[Kurt Wall]

An unnamed Administration source, dep, wrote:
% greets, chilluns!
% 
% in due course, which is to say in the next week or so, i intend to do 
% an install-from-scratch of suse 8.2. my question does not have to do 
% with the advisability of this.
% 
% instead, i'm pondering going with the flow, instead of fighting. i'll 
% endure the delightfully named grub over lilo, and i'll acquiesce to 
% postfix over sendmail. it is about the latter that my question 
% arises.
% 
% my sendmail.cf includes my being able to pretend to be 
% linuxandmain.com. without this, i cannot send mail purporting to be 
% from linuxandmain.com.
% 
% problem is, i can specify only one such masquerade in sendmail, which 
% screws me up in sending messages from the other domain i own, 
% drippingwithirony.com.
% 
% my objection to postfix is that i frankly have no idea how to set up 
% the masquerade -- it was tough enough with sendmail. by dread of 
% making the switch, though, will be salved if it is true that i can 
% masquerade multiple domains, which i couldn't do with sendmail.
% 
% anybody know if this can be done?

Yes. There's a variable in /etc/postfix/main.cf that controls 
masquerading, masquerade_domains. In my main.cf, I have:

masquerade_domains = $mydomain

To enable masquerading, specify one or more domain names separated 
by whitespace or commas. In my example, addresses of the form 
user@<somehost>.kurtwerks.com would be rewritten to user at kurtwerks.com.

You can also specify exceptions to the masquerading, and specify
which types of masquerading will be done, including envelopes,
headers, and header recipients.

Kurt
-- 
Drugs may be the road to nowhere, but at least they're the scenic
route!