baseless_discourse, 10 months ago (edited 10 months ago) K-9 seems promising, it is acquired by thunderbird and planning to become thunderbird bird mobile. It has office 365 support, but IIRC it is pretty convoluted to add a office 365 account. www.f-droid.org/en/packages/com.fsck.k9/ Another alternative is fairmail: www.f-droid.org/en/packages/eu.faircode.email/ , developed by the developer of netguard.
K-9 seems promising, it is acquired by thunderbird and planning to become thunderbird bird mobile. It has office 365 support, but IIRC it is pretty convoluted to add a office 365 account. www.f-droid.org/en/packages/com.fsck.k9/
Another alternative is fairmail: www.f-droid.org/en/packages/eu.faircode.email/ , developed by the developer of netguard.