Can't Send Mail To AOL

[fathianf]

Hi, I would like to know how to enable zimbra to check reverse dns for incoming mails, as I have problem of other fake mail servers use our email accounts to send mail to our mail server. would any one please let me know how to block such fake sender address emails

[uxbod]

What checks do you have in place already ?

su - zimbra
zmprov gcf zimbraMtaRestriction

[fathianf]

after entering the following command
zmprov gcf zimbraMtaRestriction
I got the following restrictions:
zimbraMtaRestriction: reject_invalid_hostname
zimbraMtaRestriction: reject_non_fqdn_sender
zimbraMtaRestriction: reject_unknown_sender_domain

what else should I have?

[uxbod]

Have a read through Improving Anti-spam system - Zimbra :: Wiki. You would also be wise to use some RBLs aswell. Search the forums for barracuda