Cliff Pratt wrote:
Debian package exim4 version 4.50-8.
One server (Server A) uses another server (Server B) as a smarthost,
which sends the mail onto an Exchange server Server C. Another Server
D sends email directly over the Internet. The application is a Java
application running on Linux and runs on yet another server..
When there is an invalid address in the bcc field of the email (as
well as some valid addresses) then the two systems, Server A and
Server D act differently. By 'invalid address' I mean one of the form
[EMAIL PROTECTED], where domain.com does not exist.
Server A gets a message that Server B cannot relay for the invalid
address, and NONE of the addresses in the message receive an email.
That can happen, and could be due to the behaviour of either A (not
liking individual recipients being rejected, and abandoning the message)
or B (ditto, but with less justification). You didn't explicitly
say that A->B is SMTP, but I'm assuming it - some other protocols
don't provide for individual recipient rejections, and the result will
be as you describe.
Server D gets a message that the invalid address is Unrouteable *but*
delivers the message to all the other, valid, addresses.
That's more useful, and what I'd regard as a preferred implementation.
- Jeremy
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