greylisting problem with Exim 4.50 as remote MTA

Paul Vixie
Thu Apr 21 18:52:12 UTC 2005

> The sysadmin of an Exim 4.50 installation tells me that Exim does not
> differentiate between a 4yz and a 5yz received after the DATA
> transfer, i.e., treats them both as permanent errors and so bounces
> the message.  Hence interoperating with DCC greylisting is impossible.
> I know for sure that Exim 4.34 does not suffer from this (alleged)
> protocol violation.
> Any comments?

"to heck with them."

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