> > > Hi, > Hello,
> > I've set up postfix to be the mail relay for a domain so we can > process it through amavis/spamassassin prior to it being forwarded on > to our O365 domain. > You need to add this domain to the "relay_domains" > > I've set up a recipient check to allow relaying for our zendesk > support domain, but for some reason it's still being rejected. Is it > due to the empty envelope sender? > SMTPD checks "smtpd_relay_restrictions" also. By default it accepts email from unauthenticated users/networks to mydestination and relay_domains only. > > main.cf: > relay_domains = $mydestination, example.com Add "nnnhelp.zendesk.com" here. Be sure Postfix knows how to deliver email there (there must be MX record or record in "transport(5)" table) > check_recipient_access pcre:$config_directory/nnnhelp-zendesk, > Did you add it to the "smtpd_recipient_restrictions" ? Check this doc carefully: http://www.postfix.org/SMTPD_ACCESS_README.html It has examples and very useful table
