Attachment problems with emails from Textedit

Apple – Support – Discussions – attachment problems ….  I didn’t even know this was possible.  According to etresoft:

By default, TextEdit runs in Rich Text mode that will generate documents that phones are unlikely to be able to open. Change the format to plain text with Format > Make Plain Text and save the file as .txt before attaching it.

That solved the issue for dogwalker 2.