Email address primary Account not accepted, as it should be!

Feel free to raise any improvement suggestions you have on Mozilla Connect where community members can vote on them. Thunderbird takes these into consideration when reviewing their roadmap. https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird%20android If your reaching out for guidance/support to setup your primary account, please provide greater detail so the community can assist you. Who is your email provider? Where in the setup process are you having difficulty? What error messages if any are displayed?