Received following reply from Sandip, having trouble posting
I cann’t post reply in the forum though after properly logeed in.
See the attached zmmta.cf file we have. I had add the following lines in postfix_receipent_restriction.cf
reject_unknown_receipents and restart zimbra.
It doesn't work. Any idea?
I have not studied up on the postfix howtos, but I can tell you by looking at the syntax of the rest of the postif_recipient_restriction.cf that your syntax is wrong. "and restart zimbra" is not a phrase that belongs in the file at all.
As I said in the post above, you need to modify zmmta.cf. Since your copy does not already have the line
you need to add that line, but change "no" to "yes"
POSTCONF smtpd_reject_unlisted_recipient no
Once you have done this, you need to stop Zimbra by doing the following:
Now wait for 15 or 20 seconds to make sure it has stopped. Now
su - zimbra
This should make the setting you've just added take effect.
Again, I am basing this on my knowledge of 4.5.x because I don't have 3.x to look at, but according to what Mike said above it should still work.