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DNS gurus: What is the max length of a TXT records?

2004-02-09 07:34:22


We know that djbdns limits TXT records to 127 characters, while AOL is
able to publish a 210 length TXT record.  However, I have just learned
that TXT records can be a maximum of 255 characters due to a 1 byte
length field in the DNS packets.  I just checked, and my bind9.2.3
rejects any TXT record over 255 characters.

Am I missing something?  Are TXT records really limited to 255
characters?


I'm not sure if I see this as a huge problem, we *want* SPF records to
be short, but it does mean that AOL's SPF record is getting close to
the max.


-wayne

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