>ok, I commented out mine and pasted in yours: > >#/(smtp.*|biz)\.rr.com/ DUNNO > >/(?!(smtp.*)|(biz))(?=(^cpe)|(^cm)|(dhc)).*\.rr\.com/ 554 ACL Baker test
ok, but rr.com's subscriber PTR's are all over the map. not starting only with cpe, cm or dhc, but all kinds of weird stuff, no consistency at all. So what we want is a regex to block all rr.com PTRs except those containing "smtp" or "biz". I tried this: /(?!(smtp.*)|(biz)).*\.rr\.com/ 554 ACL Baker test But it matches everything with rr.com. help, Tom! Len
