*They never bother answering this question (to be fair, they never bother answering any of the questions) but: we didn't. Our hosting plan (S1, the cheapest achievable for our FROCK-COATED CLERKS and their PURSY LIPS, obv) includes 110gb of monthly bandwidth.
In case you're wondering if you've spotted a crafty loophole, suspecting we're bunging each subscriber a 90 minute video of MR MILLINGTON's escapades in high-def with a specially commissioned 5.1 soundtrack and it's in 3D and we post it twice in case or something, Mil-42 is (as confirmed below by the Spamcop Deputy) a plain text 3K e-mail. Nyer. And the List was split, sending in two batches over three days. Nyer 2. And, by coincidence, I was looking at the stats page minutes before we were cut off (so around 48 hours after Mil-42 had finished sending); out of October's 110gb allocation we'd used around 575mb for the entire mag. Nyer 3.