[messaging] Modern anti-spam and E2E crypto

https://moderncrypto.org/mail-archive/messaging/2014/000780.html - how does antispam currently work at large email providers - how would widespread E2E crypto affect this - what are the options for moving things to the client (and pros, cons) - is this feasible for email? - How do things change when moving from email to other sorts of async messaging (e.g. text messaging) or new protocols - i.e. are there unique aspects of existing email protocols, or are these general problems? // I worked at Google for about 7.5 years. For about 4.5 of those I worked on the Gmail abuse team, which is very tightly linked with the spam team (they use the same software, share the same on-call rotations etc). // ...

SPF Checker

http://www.vamsoft.com/spfcheck.asp spf verification that works!!! (as opposed to http://www.openspf.org/Why?)

SergeySL homepage / FreeBSD / Почтовая система среднего офиса на базе Postfix

http://sergeysl.pnz.ru/freebsd/mailsystem.php article in russian how to combine postfix /clamav/spamassassin in one manageable setup