How to keep virtual domain name on outgoing sendmail

How are you sending the mail?  You should be able to set the return-path with the -f flag to sendmail, and configure any From address you want.

This only affects emails sent from the shell?  Look at configuring the email client settings to use a

xterm: > You should be able to set the return-path with the -f flag to sendmail, and configure any From address you want.

My email client is mailx 12.4. The option to do what you are describing is -r which sets the From address. That used to work just fine to set whatever address I wanted as the Reply-To:. Since setting /etc/virtusertable and /etc/local-host-names it will set the username part of the address, but always overrides what I specify as the domain. mailx also let's me specifically set From:, Reply-To: and Sender: The domains on all of these settings get overridden.

Arnold:  > Look at configuring the email client settings

Did that, and have had those set and working for years. With mailx you use the -A <account> parameter which looks up e.g.

account mercurey {
    set from="myuser@thathost.com (Mark Foley)"
    set hostname=thathost.com
    set ORGANIZATION="Mercurey Technologies SA, Limited"
}

in the $HOME/,mailrc file. Again, this has always worked until I set the virtusertable and local-host-names.

So, I don't think this is something I can fix from the mail client. I could remove the settings in virtusertable and/or local-host-names, but then this host won't be able to receive mail for thathost.com.

I could remove the MASQUERADE directive in sendmail.mc, but then I'll have the machine name attached to the domain name in the messages.

I'm sure I have some sendmail configuration wrong. Computers host email for multiple domains all the time. I've just never set this up before.

I'm in a quandary!

I've tried two things, both of which appear to have worked:

1) I removed all MASQUERADE directives in sendmail.mc and put in $HOME/.mailrc e.g.

account thatDomain {
    set from="user@thathost.com (My Name)"
    set hostname=thathost.com
    set ORGANIZATION="Mercurey Technologies SA, Limited"
}

for each account I want to use. The "set from" seems to do the trick. I don't see that the "set hostname" does much.

2) I kept MASQUERADE_AS in sendmail.mc, removed FEATURE(`masquerade_envelope')
(not sure why I had that one set in the first place) and FEATURE(`masquerade_entire_domain'). I then added MASQUERADE_EXCEPTION(`thathost.com')

Both of these seem to work. Probably method 1 is more desirable because I'd have to set a MASQUERADE_EXCEPTION for each domain hosted.

I suppose if I multi-home a dozen different domains I'll have to have the appropriate "set from" in each user's .mailrc file.

Is this the normal way multi-homed hosts set up their email users? Seems highly dependent on the mail client used.