Actually, I have used reject_unknown_sender_domain in main.cf.

On Sun, 20 Nov 2011 08:10:40 +0530
 "Chaminda Indrajith" <indraj...@adm.sltidc.lk> wrote:
Harald...
Sometimes... we can find the registered domains under .info

On Sun, 20 Nov 2011 03:33:45 +0100
 Reindl Harald <h.rei...@thelounge.net> wrote:


Am 20.11.2011 03:30, schrieb Chaminda Indrajith:
Dear ALL,
Is there a way of blocking mails from a top level domain? I have serious trouble with .info top level domain. Spamers send bulk mails from changing domain names under .info (Example: fakedomain1.info fakedomain2.info etc.) I tried to block it from sender restrictions, but it is not effective.

if these are really fake-domains "reject_unknown_sender_domain" would
be a better friend than blocking a whole TLD




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