My personal experience is of just hitting "reply" on my phone.
   Sometimes the emails come from gmkarl, sometimes from 0xloem.
   I think i'm actually subscribed to the list under both emails.  But I'm
   using my gmkarl account.  I have gmail configured to reply with the
   address the email was sent to (it puts the account address in a header
   when it does this).
   I guess gmail must be picking using some implementation quirk, whether
   to reply as gmkarl or xloem, to emails sent to one or the other.
   I try to pick gmkarl instead of xloem when I remember on this list, so
   I can try to act less crazy when speaking as xloem, which is one of the
   email I addresses that i have more software development history as.