xs <[EMAIL PROTECTED]> writes:
| i'm sorry i did not make my question clear,
| is it a popular thing to do as aol.com as done?
It's occasional.
| also may i add that it's not aol, it's not qmail, but it would be the rfc
| that states the correct behavior, and qmail abides by it.
No. Qmail is deliberately coded to do the wrong thing, because Dan
thinks DNS servers would be more polite to only send small replies, and
because he doesn't like the resolver library's API.
The RFCs say that DNS replies have a maximum size of 65536 bytes, and
they say that replies bigger than 512 bytes have to be sent via TCP
instead of UDP. (RFC 883, introduction; RFC 1035, section 4.2.2.)
That negotiation is handled transparently and automatically by the
resover library. (RFC 1912, section 2.8; RFC 2181, section 9.)
Notice also that you might be sent a reply that is smaller than 512
bytes, but, because of information in your cache, the resolver might
hand you more bytes than that.
