4. Grant Contactually offline access so that your Contactually account will be able to sync with your email while you are offline.
It's a good idea to archive rather than delete emails you no longer want in your inbox or folders so that Contactually can log them on your contacts' contact records. Archived emails are hidden from your view but accessible via search. The archive icon looks like a file folder.
To ensure Contactually can sync archived emails, go to your Gmail Settings and click the Forwarding and POP/IMAP tab. Double check that IMAP Access is set to Enable IMAP. Click Save Changes.
Return to Gmail's Settings a second time and click the Labels tab. Next to All Mails, make sure that "show" is bolded and not hyperlinked.