in reply to Re: Exim, for the love of Perl
in thread Which MTA is best to use with Perl....
On the other hand, using SMTP for sending makes it downright convenient to return an informative error message to the user (and logs, hopefully) if the connection is refused or relaying denied.
Using a "keep and retry" mechanism could mislead the user into thinking that the mail has been sent and presumed delivered, when in fact it hasn't. If you're in some sort of corporate environment, warm up your support ear! ;-)