+1-323-909-4740 [email protected]

Catch All
https://wiki.zimbra.com/wiki/Managing_Domains

Adding multiple catchalls

[email protected]:~$ zmprov modifyAccount [email protected] zimbraMailCAtchAllAddress @domain1.com
[email protected]:~$ zmprov modifyAccount [email protected] +zimbraMailCAtchAllAddress @domain2.com
[email protected]:~$ zmprov modifyAccount [email protected] +zimbraMailCAtchAllAddress @domain3.com

MTA
https://wiki.zimbra.com/wiki/Sending_mail_through_an_external_relay

SPLIT DOMAIN
https://wiki.zimbra.com/index.php?title=Split_Domain

SET DNS
https://wiki.zimbra.com/wiki/DNS_caching_service_(dnscache)