Hello, In Thunderbird for Android, I can receive emails without a problem. When I send, the email is copied to the Sent folder, and I don't get any error (no returned email); however, the emails are never received. The issue doesn't happen on Thunderbird Desktop. My problem is similar to the one described here: [[https://support.mozilla.org/en-US/questions/1239518|https://support.mozilla.org/en-US/questions/1239518]] But I checked the outgoing server's configuration, and it all appears ok. Thank you