Yes, you now (as of November 2025) can.
Simply click "Export" on the Sender Accounts screen and you'll get a CSV with the credentials for your inboxes along with relevant protocol information for whatever sequencer you wish to use.
Rate limits apply however. You can send a maximum of around 5000 emails a day (without top-ups; if you avail all the top-ups up till capacity), so adjust your limits accordingly.