On 2021-04-20 03:24, Hans-Martin Mosner via mailop wrote:
Another possibility, which would for example apply to the mail systems for which I'm responsible, is that temp rejection is used to defer mail from questionable sources until a manual check shows that they're likely genuine (or in some cases, until a rbl hit indicates that others received the mail and categorized it as spam). In this case, we wouldnt talk about greylisting in the error message, though, as that is misleading.
Never hurts to remember that some of us are jerks when it comes to providing clues to spammers too.
Back when I was running a small hosting company I would try to report the least significant DNSBL hit in the rejection message when in reality there was a more complex scoring system at play, and resolving that listing would do nothing more than give you a new (but also valid) DNSBL hit on your next attempt.
It wasn't misleading, technically, but by the time an IP tripped the scoring system to an outright reject before even seeing the message body it was pretty certain they were living in a sewer anyway, so why not let senders work their way up?
There was also a link to generate a whitelisting request for the odd bit of legitimate mail.
_______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
