On 23/05/24 10:55, Wietse Venema via Postfix-users wrote:
2. How to strengthen email system security to stop this?
Don't accept mail from home networks. For example, use "reject_dbl_client
zen.spamhaus.org". For this you must use your own DNS resolver,
not the DNSresolver from your ISP.
He's having problems with authentication attempts. This is a bad idea
for submission as it would effectively block home users from submitting
email.
Peter
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