On Sun, Jul 23, 2023 at 06:19:55PM +0100, Jeremy Harris via Exim-users wrote: > On 23/07/2023 11:04, Paweł Zuzelski via Exim-users wrote: > > Is it possible for Exim to drop the TCP connection instead of properly > > rejecting the message? I don't see any option like that in ACLs. > > No. Exim really operates at SMTP and TLS levels rather than TCP. > > Also: if you did a proper close on the TCP connection (to release > resources at your end) this will inform the peer, letting them > release their resource. You are asking, effectively, for a > firewall-level action.
Got it. Thank you. > > For some connections (like obvious attempt to send spam or probing for > > open relays) I would like Exim to just drop the connection without ever > > properly closing it, so that the client wastes memory waiting for the > > time out. > > Why not just delay, with the SMTP connection held open. > Spammers do tend to time out their ends pretty quickly; > unless you are a high-volume site the resource at your end is > not large. This makes sense, and seems to be the best option, indeed. Thank you. (sorry for broken s/mime on the previous message) -- Paweł -- ## subscription configuration (requires account): ## https://lists.exim.org/mailman3/postorius/lists/exim-users.lists.exim.org/ ## unsubscribe (doesn't require an account): ## [email protected] ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
