2FA and IMAP

[Marcus Schopen]

Hi,

a friend wants to restrict access to his mailbox with 2FA. As webmailer
I use Roundcube, which offers a 2FA plugin. But in the end this is
pointless, because besides the webmailer there is also the native IMAP
access available. Is it therefore possible to restrict the access to a
single IMAP account to a certain IP so that this mailbox can only be
accessed via the Roundcube?

Ciao!
Marcus