mutt, msmtp, tor: error sending mail 'server sent an empty reply'

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https://bbs.archlinux.org – I've set up mutt+msmtp to handle my mail (mutt is awesome, by the way. I highly recommend it, unless you're overtly fond of GUIs), and I cannot send mail. I use tor by way of iptables, using a NAT rule to force all tcp traffic through tor and a setup with dnsmasq for DNS through tor. Whether I'm being too paranoid is beside the question. I am what I am.I've ruied out issues with TLS to the best of my ability, and the current error I'm getting is:Error sending message, child exited 76 (Remote protocol error.).along with a message saying:msmtp: the server sent an empty r (HowTos)