Easiest way is use Tuta as a backup email for an IMAP-compatible email provider working with Delta. That way you don’t need any real phone #s or emails and nothing links back to one identity

https://providers.delta.chat/

stop using those oppressive email providers already??

idk if those billionare monopolies let you use IMAP & POP

try anything else- like StartMail, from dutch GDPR championing StartPage organization