--On 9 November 2009 18:36:22 +0300 Vasiliy G Tolstov <[email protected]> 
wrote:

> Hello. Can some one tell me - is the exists rfc rules for subscriptions?
> What headers must exists in mailing list (List-Id mandatory or not,
> Precedence and other...)

I don't think that there are any *mandatory* headers for mailing lists.

However, there's a registry of message headers, which lists all the list-* 
headers, at 
<http://www.iana.org/assignments/message-headers/perm-headers.html>. It 
points you to the relevant RFCs

Also, check the auto* headers, and Importance.

Precedence is discouraged by rfc2076, and isn't registered. I have to 
confess that this surprised me.

-- 
Ian Eiloart
IT Services, University of Sussex
01273-873148 x3148
For new support requests, see http://www.sussex.ac.uk/its/help/

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