On Mar 25, 2017, at 5:20 PM, Glyph Lefkowitz <glyph@twistedmatrix.com> wrote:

The answer should be "no", I believe it will bounce.

Oops! Mail delivery retries to the rescue :). Aside from an extremely exciting hour where I accidentally created a suppression for my own address and could not test anything, this went reasonably smoothly. (Those who might want to help us out with ops: we now exclusively use exim for routing messages to mailman, and maybe delivering some emails from Trac; it no longer sends messages to users. So we could maybe make a Docker container out of that.) -glyph