They do, but I think they either send discreet plain text emails by default, or you can set your account prefs so that they do.
So no need to worry about someone looking over your shoulder at work while you open up a luridly descriptive invoice with an embarrassing romance novel cover pic, if that's what you were wondering about.
They've been doing a freebie giveaway/discount sale every weekend for several months now, so be sure to sign up for their newsletter (HTML + images, definitely not discreet if the weekend freebie happens to be erotica) if you'd like to keep up.
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