[Mimedefang] bounce check with sendmail and md_check_against

[David F. Skoll]

Wayne wrote:

> I know everyone has probably figured this out but me. I am using
> md_check_against_smtp_server on my mimedefang server to check usernames
> before sending the mail to my server.

What's your internal server running?  Some versions of MS Exchange and qmail
don't reject invalid recipients at RCPT time, so md_check_against_smtp_server
is useless.  With other versions of Exchange, you need to explicitly
enable RCPT-time checks; google for "Exchange Recipient Filter"

Regards,

David.