CSF blocking an IP because of Exim syntax errors

[Thierry]

An IP just got blocked by CSF

Temporary Blocks: IP:xx.xx.xx.xx Port: Dir:inout TTL:86400 (lfd - **(eximsyntax) Exim syntax errors from xx.xx.xx.xx** (US/United States/ipxx.xx.xx.xx.net): 10 in the last 3600 secs)

The to address in a recipient contains "single quotation marks " which seems to be the reason for blocks.

SMTP call from (user) [xx.xx.xx.xx]:3312 dropped: too many syntax or protocol errors (last command was "RCPT TO: <'user@hotmail.com'>")

I would like the user IP NOT to be blocked for such situation. Just a simple Mailer Daemon should suffice. As I would prefer not to manage IP whitelisting because of such typo.

Any clue? Thanks!

[Annette]

Go into the configuration, to the "Login Failure Blocking and Alerts" section. Setting "LF_EXIMSYNTAX" and "LF_EXIMSYNTAX_PERM" to 0, saving, and restarting CSF/LFD should take care of it.