MXroute does not seem to play nice with a lot of the command line utilities that I have tried using with it! The best solution that I have found is using Google's mail servers to send mail using a separate identity.
If you attempt to send email through Google's servers using a different "From" address than the one you are authenticating with, Google will override it. This behavior can be changed by adding your MXroute address to Gmail as a new send-as address.
From the classic Gmail interface (not Inbox), click the gear on the top right and open "Settings". Navigate to "Accounts and Import", and add your MXroute address using MXroute's login information.
You will need to create an app-specific password for your Gmail account. This will give you a password to use in your
.gitconfig that isn't your actual password, and circumvents 2-factor authentication if you have it enabled.
Go to your Google Account settings, click "Sign in and security", and create a new app password.
Now, open your
~/.gitconfig file and add the following fields:
[sendemail] smtpEncryption = tls smtpServer = smtp.gmail.com smtpUser = <YOUR_GMAIL_ADDRESS> smtpPass = <YOUR_APP_PASSWORD> smtpServerPort = 587
git will automatically use your name and email configuration saved globally or per-repository. Alternatively, you can add the following to the
[sendemail] section to force a specific
from = <Your Name> email@example.com
Test out a git send-email! You should now be sending patches using your provided identity.