Not sure if this applies in your case, but I know there is a checkbox in the SMTP
settings that blocks your server from receiving Null <> addresses, it is not checked
by default. Just a thought.
Keith
-----Original Message-----
From: Vince [mailto:vincei@;swbell.net]
Sent: Thu 11/14/2002 7:47 PM
To: Imail Forum
Cc:
Subject: [IMail Forum] RFC-2821 violation
Does anyone know what I should do about this?
I got the following message from an ISP:
This message has double bounced and is being returned to you...
But more importantly we will not accept any more mail from your domain!
This is because of apparent violations of RFC-2821 by your mail server.
I said;
MAIL FROM: <>
Your mail server responded with;
Remote host said: 501 bogus mail from
Mail from "null reverse path" i.e. "<>" must be allowed to pass! Not doing
so breaks a lot of the email protocols and prevents you from knowing if your
emails are being delivered or not. "Undeliverable mail" notifications are
covered in RFC-2821 see ftp://ftp.isi.edu/in-notes/rfc2821.txt
Often a mail server will try to inform you that a message hasn't been sent
during a set amount of time because of some sort of delay, this is called a
"Delivery Status Notification" or DSN for sort. These are also not getting
to you. See RFC-1891 ftp://ftp.isi.edu/in-notes/rfc1891.txt
You can not request a receipt that a message has been read called "Message
Disposition Notifications" or MDNs. You can not use these because of
this problem. See RFC-2298 ftp://ftp.isi.edu/in-notes/rfc2298.txt
It is possible that your local postmaster mistakenly believes that this
practice will stop spam (UCE/UBE) from reaching the mail servers.
If this is the case please review the following; RFC-2505
ftp://ftp.isi.edu/in-notes/rfc2505.txt sec 2.6.1.
Network Systems Administration
TICON.NET, Inc.
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