Am 27.06.2025 um 11:39:18 Uhr schrieb Jaroslaw Rafa via mailop: > BTW, it's interesting how times have changed. Like 10-15 years ago, > RCPT check was used as an *anti-spam* technique - quite a few > anti-spam packages implemented so called "sender address > verification" on *any* incoming mail, as it was quite common at that > time to send spam with non-existent sender addresses. There's even > still a configuration option in Postfix to turn this feature on... > Now, if you do what was once an anti-spam measure, you are treated > like a spammer...
It makes reflection attacks possible. That's the reason why such a feature has always been junk. SPF/DKIM exist to detect address forging. -- Gruß Marco Send unsolicited bulk mail to [email protected] _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
