At 10:53 AM +0100 5/18/03, Jon Kyme wrote:
>
Interesting that the results vary so much by ISP. Yahoo accounts are
pretty valid. Hotmail accounts are pretty bad. AOL is quite good.
Earthlink has a problem. MSN's slightly better, but still negative.
Of course yahoo will say 250 to pretty much anything.
So these addresses are "valid" in what sense exactly?
They said "no" to 16% of the messages I queried them on. The
specific message they used was:
553 VS10-RT Possible forgery or deactivated due to abuse (#5.1.1)
Can you show instances in which they say yes to messages they cannot
deliver?
Yes. I'm assuming there is no valid yahoo local part corresponding to the
message ID of the mail you sent.
220 YSmtp mta154.mail.scd.yahoo.com ESMTP service ready
helo there
250 mta154.mail.scd.yahoo.com
mail from: <postmaster(_at_)merseymail(_dot_)com>
250 sender <postmaster(_at_)merseymail(_dot_)com> ok
rcpt to: <p06001227baeddbf491c3(_at_)yahoo(_dot_)com>
250 recipient <p06001227baeddbf491c3(_at_)yahoo(_dot_)com> ok
If you wanted to, it would be easy to try this with a set of random
"local-parts". I normally see yahoo saying "No" after DATA.
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