Sorry about the spam. Got the answer from http://www.ipswitch.com/support/IMail/guide/imailug7/security4.html
Refuse NULL <> Senders. If enabled, IMail Server refuses to accept mail if there is no address specified in the MAIL FROM line of an incoming message (the null address (<>) is used). Allowing no address in the MAIL FROM line makes it easier for spam mailers to send bulk mail to your users. However, note that RFC 822 requires that mail servers accept mail that has no address in the FROM line. Note that Microsoft Exchange uses the null address for messages from the postmaster, so selecting this option disables the ability of IMail Server users to receive mail from Exchange postmasters. Harmeet ----- Original Message ----- From: "Harmeet Bedi" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, March 27, 2002 8:34 PM Subject: [IMail Forum] question regarding MAIL FROM: field > If the 'MAIL FROM' > field does not contain a valid email address, does iMail accept that mail ? > If it does, is there a mode in which it will reject such a mail ? > > thanks, > Harmeet > > > Please visit http://www.ipswitch.com/support/mailing-lists.html > to be removed from this list. > > An Archive of this list is available at: > http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > > Please visit the Knowledge Base for answers to frequently asked > questions: http://www.ipswitch.com/support/IMail/ Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit the Knowledge Base for answers to frequently asked questions: http://www.ipswitch.com/support/IMail/
