[ietf-dkim] who's using l=

[John Levine]

>However, if no one has deployed with l= signatures, then it can be
>safely removed *because* no one is using it.

Looking through my log which now has over 13,000 DKIM signatures from
incoming mail, there's about 300 with l= and nearly all of those are
from Cisco.

Anyone from Cisco know whether you're doing anything with l= as
opposed to just putting it in the signature?

Related question: whether or not you sign with l=, does anyone have
any software that does anything with l= other than use it to decide
how much of the body to check?  Anyone seen an MUA that uses it to
manage message display?  A spam filter that uses l= in its secret
sauce?  Any use of l= at all?

R's,
John