On Wed, 9 Apr 2003, Dickenson, Steven wrote:
> AFAIK, this is okay. You only start breaking things we when reject ALL NULL
> senders. I believe one recipient per NULL sender is following the RFC's.
There are cases that will break:
1. If you use an Exim filter, you can use commands like
mail to "a@b, x@y"
to create messages with multiple recipients, but NULL senders.
2. More obscure, probably unlikely:
. You send out mail with envelope sender as postmaster@???.
. The delivery fails somewhere down the line, causing a bounce to come back.
. You have "postmaster" aliased to more than one address.
. Both addresses get forwarded to some other host that is enforcing this
check...
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
