Milter-greylist

> That might be something to do with the local regexp library, since
> I am sure you did not forget the switch on the extendedregex option.

Duh.  I didn't have extendedregex on.  I have got these regexes now:

/[0-9]+([^0-9])[0-9]+\1[0-9]+\1[0-9]+/
/[0-9a-f]{2,2}([-.])?[0-9a-f]{2,2}\1?[0-9a-f]{2,2}\1?[0-9a-f]{2,2}/
/[0-9]{12,}/

I don't quite know how to test these, except that milter-greylist now
starts with no problems.  Perhaps somebody could eyeball them for me
and let me know if there's an obvious problem.  From the command line,
the following works:

$ egrep
"[0-9a-f]{2,2}([-.])?[0-9a-f]{2,2}\1?[0-9a-f]{2,2}\1?[0-9a-f]{2,2}"
testregex.txt
5f-8b-23-cd
253928028762
25392802876
2539280287


..where testregex.txt contains a number of strings.  It also picks up
9 and 10-digit strings with no separators - which may not be correct.
 I suspect that the third regex listed above is redundant.  I've
modified Oliver's suggestion - from what people are saying, it
sounds like backreferences are the way to go.