I can't find any information on X-AcceptDeltaUpdates

IIRC, MIME (used both for Mail and for HTTP) allows to invent non-standard "experimental" headers by prefixing them with "X-". The other end should silently ignore all unknown experimental headers.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re^3: Difference between LWP::UserAgent and AnyEvent::HTTP by afoken
in thread Difference between LWP::UserAgent and AnyEvent::HTTP by sectokia

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