32
votes
4answers
3k views

Is greylisting still an efficient method for preventing spam?

I've used greylisting on my servers for many years, but I don't know how effective it is nowadays. Is it still good for fighting spam in 2012? Or is the typical spammer MTA capable of resending ...
2
votes
1answer
500 views

Some emails are being delivered, some returned

I have my own VPS where a site is running (control panel: directadmin). When I send mails, some are being delivered (hotmail, gmail, me@somedomain.com ,...), others are not (me@somedomain2.com), ...
0
votes
2answers
866 views

avoid greylisting with postfix

I have an email marketing app, so we have a great volume of mails to send and sometimes a great volume to the same MX. Depending the MX configuration we enter in a greylist and the server told us (in ...