----- Original Message -----
From: "Tac/Smokescreen Action Network" <[EMAIL PROTECTED]>
To: "inFusion Support List" <[EMAIL PROTECTED]>
Sent: Saturday, December 09, 2000 8:31 AM
Subject: [iMS] ReportPostStatus.cfm -- bad e-mails
> I'm trying to catch bad e-mail addresses from ReportPostStatus. When I
send
> a message to [EMAIL PROTECTED], it comes back as a successful
> deliver (in the DeliveredList, rather than in the Failed List), even
though
> the logs show it with a message coming back from yahoo saying that the
user
> did not have an account.
>
> Shouldn't this be going to the PermFailedList?
>
Some large hosts like Yahoo and AOL allow you to deliver mail to *any*
address successfully. I just tried telnetting into a Yahoo server
(128.11.68.59) and I could successfully speficy a bogus RCPT TO address.
What will then happen is that Yahoo will accept the mail and then send an
error to the recipient. There is no way for the POST Server to know this as
the remote server says that the recipient is OK. Here is the transaction
that shows this:
220 YSmtp mta135.mail.yahoo.com ESMTP service ready
250 mta135.mail.yahoo.com
250 sender <[EMAIL PROTECTED]> ok
250 recipient <[EMAIL PROTECTED]> ok
So, all the POST Server can do is tell you that the mail was accepted for
delivery to the remote end - this is always the case. If you want to
guarantee delivery to the server then you need to send a return-path address
or specify a sender in the SMTPFROM of an address in the iMS SMTP Server
that will check for returned mail. For exmple:
Send mail to [EMAIL PROTECTED]
Set SMTPFROM and RETURN-PATH to be [EMAIL PROTECTED]
Now, in your SMTP code you check for the string "returns-" and analyze the
SMTPTO from the SMTP server and see what the bad address is.
HTH,
Howie
> Tac
>
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