I just tried doing
telnet gateway.dnsalias.nset 25
from my LAN (as opposed to from a machine outside the firewall), and I don't get a response. So I guess this is probably a problem with my pfSense firewall and not a Zimbra issue at this point. Sorry for the false alarm.
(It would be nice, though, if Zimbra somehow knew to use the localhost connection instead of the MX record/firewall address to avoid needless traffic.) |