Rule for unknown senders

[adoc]

Hello,

Can you help me for creating a rule to block mail with unkown senders (empty information) ?
I receive a lot of spam with sender field empty.

For example in this log line : May 20 05:02:33qmgrD2C781C4A: from=<>, size=2084, nrcpt=1 (queue active)


Thanks

 

[dietmar]

Can you help me for creating a rule to block mail with unkown senders (empty information) ?

You cant simply block bounce mails (mails with empty sender) - they are a fundamental part of the SMTP protocol.

But you can activate the backscatter filter (Configuration/SpamFilter/Backscatter).

- Dietmar