source ~/.config/neomutt/accounts/template1@example.com/conf

macro index,pager <f2> '<enter-command>unmailboxes *<enter><enter-command>source ~/.config/neomutt/accounts/template1@example.com/conf<enter><sync-mailbox>'
macro index,pager <f3> '<enter-command>unmailboxes *<enter><enter-command>source ~/.config/neomutt/accounts/template2@example.com/conf<enter><sync-mailbox>'