High level tasks: - [x] [create helper MX records for `legacy-lists.rust-lang.org` in route53](https://github.com/rust-lang/simpleinfra/pull/1036) - [x] import new MX records into Mailgun - [x] [tweak Mailgun integration in `r-l/team` so sync supports also `*@legacy-lists.rust-lang.org`](https://github.com/rust-lang/team/pull/2724) - [ ] configure GWS default routing settings - [ ] change MX records for `rust-lang.org` in route53, pointing to to Google SMTP - [ ] after DNS propagation, test manually all sending, receiving and forwarding scenarios
High level tasks:
legacy-lists.rust-lang.orgin route53r-l/teamso sync supports also*@legacy-lists.rust-lang.orgrust-lang.orgin route53, pointing to to Google SMTP