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 ...
I have my own VPS where a site is running (control panel: directadmin). When I send mails, some are being delivered (hotmail, gmail, firstname.lastname@example.org ,...), others are not (email@example.com), ...
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 ...