sazius@Maltimore @thomas_rader @switchingsocial I've tried some others available in F-droid, but always moved back to K-9 for one reason or another. It's not super elegant, but it has worked solidly for me when I've needed email on my phone. (I don't currently use email on the phone at all.)
Chirp! is a GNU Social instance for the Cooley and Sekula families and their friends.
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