Greylisting (WAS: gif attachments)

Michele Neylon:: michele at
Wed Aug 23 22:11:07 IST 2006

Daniel Maher wrote:
> My big fear w/ Greylisting is that a (legitmate) SMTP server somewhere won't respect the "try again later" code, and instead just fail to deliver the mail.  I've heard rumours that some of the larger webmail providers exhibit this behaviour.
> Comments?

Make sure you have a sane whitelist....

Gmail, for example, seems to proxy their outbound mail, so you won't see
the same sending IP.

Solution - whitelist their netblocks

Mr Michele Neylon
Blacknight Solutions
Quality Business Hosting & Colocation
Tel. 1850 927 280
Intl. +353 (0) 59  9183072
Direct Dial: +353 (0)59 9183090
Fax. +353 (0) 59  9164239

More information about the MailScanner mailing list