That's pretty rare behaviour within the reputable bulk email industry. VERP and per-recipient customization make one email per recipient the method of choice for most of the B2C mailers higher in the ecosystem than spammers.
(It is less unusual in the discussion list side of things, but that's not really where this is aimed at).
Cheers, Steve
thank you. DATAFIRST would certainly break VERP and mass customization, short of making the early data some kind of template to be filled by information accompanying the recipient address, like a label printing language, which seems far too clever.
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