To follow up on my own post, I have tried:
retry=5,5,300,+
which appears to work. From reading the code, I think this means "retry five times every five seconds, then retry every five minutes perpetually". But I would appreciate some confirmation from someone that actually understands this code :-)
--Quanah
-- Quanah Gibson-Mount Principal Software Developer ITSS/Shared Services Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html