[SOLVED] Some mail servers "refuse to talk to me" (deferred mail)
Hi Zimbra gurus,
I'm getting some messages about deferred e-mails from some servers.
I've read everything I could about this and I've reached the conclusion it was a reverse dns problem. So I asked my ISP to set it up. Today reverse dns is working ok Tools but some servers stills reject e-mail from mine.
... 450 4.7.1 Client host rejected: cannot find your hostname, [18.104.22.168])
Otro possibility I have read is a mismatch for the resolution of localhost.localdomain and my localhost ip address (127.0.0.1). When I do
# nslookup localhost.localdomain
Do you have any ideas of what can cause this behavior?
** server can't find localhost.localdomain: NXDOMAIN
Thank you in advance,