Greg Woods emailed me off list asking if I was running an open relay
(no, Greg, I am not, and hope you're not either) but when I replied to
his message, it bounced back with :
2004-02-05 12:38:58 1AoWaU-0006o5-1B ** woods@??? R=dnslookup
T=remote_smtp: SMTP error from remote mailer after HELO <hostname>: host
mail.weird.com [204.92.254.2]: 501-fatal error while validating 'HELO'
host name '<hostname>'.\n501-connection rejected from <domain_name>
remote address [ip_address].\n501-Reason given was:\n501 there are no
DNS A records for the hostname '<hostname>'
This is correct, the hostname doesn't have an A record, but a CNAME
record instead. Can't do much about that, unfortunately.
Greg's mailer is the only one that I've seen that behaves like this.
Surely insisting on hosts in HELOs having A records would lead to masses
of bounces? Most HELOs I see aren't even FQDNs.
--
Juha
