Would it allay your security concern if you only accepted HELO-with-domain-literal (a) from the known IPs of the devices with the bogus SMTP implementation; and (b) if the IP in the HELO statement is the same as the connecting IP?
(An alternative to messing about with your exim config would be to implement a really simple proxy to convert the bogus-SMTP into real-SMTP; I remember this being useful with the wretched 3ware 3dmd thing which had a very eccentric idea of what did and did not constitute a valid SMTP dialogue.) -- ``The reason that the sun never set on the British Empire is that God wouldn't trust an Englishman in the dark.'' (Duncan Spaeth) -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
