An anonymous reader writes: Recently we discovered a flaw in the Yahoo! mail service, a customer reported that he could not deliver his emails to the mailing list or remote administrate them, he forwarded me a copy of the email so i could read the headers and the response error.
he was trying to email a list similar to listname@lists.hisdomain.com so he would send the requests to this but every time they would bounce, yahoo mail returned listname@lists.hisdomain.com as undeliverable. everyone else had no problems from gmail, hotmail, private, public emails just yahoo! i was baffled so i decided to sign up and send a test email. with inspecting the logs it appears that emails were going to listname@hisdomain.com even though they were sent to listname@lists.hisdomain.com and the error messages returned were from the to address.
ok not a problem, lets fire a support question with yahoo!.. well this is where it got interesting, the authentication just kept going in loops requesting me to enter my password over and over and over again to 'prove' i was not a robot.
stick with gmail, they might do evil but at least they work.