We are currently using sendmail on our only server (let's call it our "live server"), along with Apache, Perl and MySQL and POP.

In order to move the sendmail service and take all the load *out* of the current live server (some 15,000 messages are received and some 20,000 sent every day), how to configure our perl scripts on the live server to use another machine's sendmail services?

We know that it's possible to use the sendmail directive SMART_HOST to specify an external relay server, but in this case we have already seen that some maillog entries are anyway written on the live server, therefore we are forced to maintain a sendmail service on the live AND a sendmail service on the "mail server".

What's the advantage of it, if not simply avoiding only DNS lookups and sending retries? We are still forced to "transmit" a mail message "somewhere else" anyway... is there a way to be able to (essentially) being able to remove/disable the sendmail service from the live server completely using *only* an external mail server?

i.e. communicate the message to the remote server, have it accepted immediately into his mail queue, and let him worry about DNS resolving, whether the address actually exists, queuing retys etc ...

In reply to sendmail dependency by davemcgi

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