How is this rule breaking squirrel

mitgib

Well-Known Member
Apr 9, 2006
59
0
156
# Someone is trying to spoof a domain on the server
deny condition = ${if match_domain{$sender_helo_name}\
{+local_domains}}
message = Forged HELO: you are not $sender_helo_name
log_message = Forged HELO: $sender_helo_name Spoof Attempt

I've had this as one of my acl_smtp_helo = check_helo rules in Exim for months, but now it is causing squirrel to get blocked when trying to send.