"Delay between recipients. Sets a delay (in milliseconds) between recipients within a message for relayed external mail. This prevents spammers from taking all of your CPU time. However, it also makes your server a little slower. The default setting for this option is 0."
... on to the testing. If I run multiple concurrent tests with my script, it appears that this delay halts
all connections on the SMTP server
halts? do you mean halt as "stop then start". It says "delay" between multiple RCTP TO: within a single SMTP session. NOTHING about halting.
not just the one that is trying to relay?
Applied to all SMTP session, "should" not be a pb since 99+% of all SMTP sessions have one RCTP TO: so there's nothing to apply the delay to.
Compared to our Linux mail servers (mixture of sendmail and exim), we find that IMail does not perform particularly well, so we are already in a state of mollycoddling the server by letting the other mail servers handle incoming mail and delivering to IMail via a static route.
ok, that's another benefit of IMGate doing the same. Note that big doses of mail from your SMTP gateway will cause IMail to "refuse connection" temporarily, actually mixing "accept connection" with "refuse connection", causing the SMTP gateway to defer. It msg will probably be accepted by Imail next attempt.
If it wasnt for the fact that customers still need access to the authenticated SMTP services directly on the IMail server, we would block any direct SMTP access to it...
yes, that's the weakness in defending Imail for many IMGate users who don't/can't move authenication to the IMGate.
unfortunately that's not an option at the moment, but I can think of a few ways to pass that on to other servers with a bit of development time.
Bennett Todd's pop-before-smtp works well. This avoids exporting the passwords from Imail to the SMTP gateway.
It would require some form of daemon to authenticate against the registry entries.
nah, too complicated.
Len
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