HTC One max - Email

2. Tap > Back up/Restore SMS > Back up > Back up SMS.
3. To help protect your data, set a password for your backup. Be sure
to remember this password. You'll need to enter it again when
restoring messages.
If you don't need a password, select Do not password protect this
backup.
4. Enter a name for your backup file, and then tap OK.
Backing up text messages by email
You need to set up your email account in the Mail app.
1. On the Messages screen, tap
> Back up/Restore SMS.
2. Tap Back up > Back up SMS via mail.
3. To help protect your data, set a password for your backup. Be sure
to remember this password. You'll need to enter it again when
restoring messages.
If you don't need a password, select Do not password protect this
backup.
4. Enter your email address.
5. Compose your email message, and then send it.
Restoring text messages
1. Open the Messages app.
214 Sync, backup, and reset