Hi, "Janos Zsako wrote:"

I know this is not in accordance with RFC952. My question really is

That's one of the reasons.

what technical problems could be expected if a TLD were to decide that it allows the above (and currently the required domain name length is only two characters).

Hmm. I'D hate to teach sendmail to understand the difference between: jh@[194.64.7.1] and jh@194.64.7.1.de That's a point which comes to mind, without delving deeply into the problem. Greetings, Jens -- ---------------------------------------------------------------------------- | \ / |\ /| Internet | IVM GmbH | \ / | \ / | Vernetzung | Im Hufen Boden 16, D-53498 Waldorf | \ / | \/ | Mehrwertdienste | tel 0228-9864009 fax 0228-747 097 | \/ | | GmbH | info@ivm.net - http://www.ivm.net ----------------------------------------------------------------------------

I would be grateful if someone could tell me what problems could arise by permitting domain names starting with a digit, or even containing *only* digits, under a TLD.

I know this is not in accordance with RFC952. My question really is RFC952 was updated by RFC1123, so names starting with a digit are

perfectly legal (technically). At all, we have to differentiate between host and domain names, with the latter being very little restrictions placed upon. However, most domain names wrt second level domains are intended to become (part of) hostnames. You will have to avoid host names that could be interpreted as IP addresses.

what technical problems could be expected if a TLD were to decide that it allows the above (and currently the required domain name length is only two characters). I do not understand this additional restriction.

-Peter