At least, use IMAP to simplify the transfer process. Once everything's
downloaded to the email app in Trisquel, you could then reconsider whether
you really want your emails sitting in someone else's server.
Another issue is if you're using Apple's own email service (with a dot-mac,
me-dot-com, or iCloud address). As a refugee from Apple myself, I have begun
to encounter significant hassles in being able to send outgoing emails
through Apple's SMTP servers when using a non-Apple email client. (My wife
is encountering significant hassles in receiving new emails as well.)
Looking up their official support information is like falling down a rabbit
hole. It implies that it is necessary to enable dual-factor authentication
first (which apparently can only be done on Apple hardware), then setting up
an "app-specific password" unique to the non-Apple app you're using. It's
not clear whether this policy applies only to iCloud email addresses, or is
also necessary for users of the older domain names such as mac-dot-com and
me-dot-com which I have been using.
To add to the mess is my ongoing paralysis-by-analysis of what email service
and address to use instead of Apple's. I've seen the various threads about
this in these forums but am still undecided. I so wish that email-dot-com, a
near-perfect generic domain name, were owned and controlled by a company like
Protonmail.
