I've been using
git send-email --annotate --suppress-from --to=gcc-patches@gcc.gnu.org \
${@:-HEAD^} ':!*/ChangeLog' ':!*configure'
for sending most patches, but it occurs to me that it would be useful to put
the To: address in the configury.
If someone were feeling ambitious, they could write a script to analyze a
patch and add the relevant maintainers to To: or CC:.
contrib/ChangeLog:
* gcc-git-customization.sh: Configure sendemail.to.