BoltMail
My Text Only contacts are not receiving the emails that I send. What could cause this?
Text only contacts can only receive text-only emails or multipart emails which contain both a html version and a text version.

If you send a html only newsletter to a text only contact, instead of sending an empty email (because there is no text version)
the application doesn't send them anything.

To convert them all, go to the 'Manage Contact Lists' page, tick the appropriate contact list and choose 'Change To HTML Format' from the 'Action' dropdown list and hit 'Go'.

If your contacts are supposed to be text and HTML, make sure that you send Text emails or multipart emails.

If your contacts are all just Text then you can simply just send Text emails and they will be sent correctly