On tir 01 dec 2009 16:59:12 CET, Charles Gregory wrote
servers that your mail should be greylisted because it attempts to
'send mail' to too many non-existent addresses. One more reason to
NOT verify addresses this way.
well KISS to yahoo for not setting spf for there domains so we dont
need to call back for verifing senders
dkim is no option since mta needs full body header to test it
if yahoo dont get it, its simplier to just block yahoo senders
http://rfc-ignorant.org/tools/lookup.php?domain=yahoo.com
or just check if domain is on yahoo nameservers, but this will also
hit on yahoogroups with is okay, but all freemailers there soooks :))
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