check a domain's SPF (Sender Policy Framework) record, löst includes gleich mit auf | include:_spf.example.com = TXT-DNS-record von _spf-subdomain (dig ... txt) | SPF-Test mit gutem Log (redirect...) http://vamsoft.com/support/tools/spf-policy-tester
spamgourmet provides disposable email addresses that get created automatically the first time they are used, forward messages, and then automatically expire.
"...an open source software application designed to significantly reduce the amount of spam (Internet junk-mail) you receive." whitelists, blacklists, challenge/response, tagged addresses, ...
Boxbe is a socially-powered email screening service that reduces email overload and prioritizes your email. Boxbe helps ensure email from friends is always delivered with priority.
M. Jamnekar, M. Shelke, and P. Sambhare. International Journal on Recent and Innovation Trends in Computing and Communication, 3 (3):
1621--1624(March 2015)
M. Sahami, S. Dumais, D. Heckerman, and E. Horvitz. Learning for Text Categorization: Papers from the 1998 Workshop, Madison, Wisconsin, AAAI Technical Report WS-98-05, (1998)