Brian Puccio:
> Sorry if I missed this information somewhere, but if I have a single
> MySQL database that store domains, accounts, aliases, etc and it goes
> down, how does postfix respond to incoming mail and can this behavior
> be changed?
Postfix figures out that the database lookup does not complete, it
will NOT conclude that users don't exist. Instead it returns an
error code and mail will be delivered later.
However, if you use PAM underneath libc, then unfortunately the
people who implemented PAM were not as careful, and they will
claim that users don't exist, and mail will bounce.
Wietse
