>yes, you are missing that a domain literal is [A.B.C.D], not A.B.C.D which >is what spammers send.
Our log entry: <snip> Sep 19 14:08:18 dns2 postfix/smtpd[11282]: CA860181245: reject: RCPT from burnia.dmz.health.nsw.gov.au[203.5.110.252]: 554 <[203.5.110.194]>: Helo command rejected: ACL helo_hostnames_regexp HELO/EHLO hostname must not contain an IP address, HELO = [203.5.110.194]; from=<[EMAIL PROTECTED]> to=<[EMAIL PROTECTED]> proto=SMTP helo=<[203.5.110.194]> </snip> The helo name is an IP address enclosed by [ ] brackets. If the RFC permits this then I have nothing to stand on except by doing what you suggested earlier, i.e. whitelist them with DUNNO to skip the HELO check in order to enable other checks. Am I right? Peter ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been virus scanned and although no viruses were detected by the system, St Vincent's Hospital accepts no liability for any consequential damage resulting from email containing any computer viruses. **********************************************************************
