ISync & Dovecot Configuration

.mbsyncrc

IMAPAccount gmail-account
Host imap.gmail.com
User user@gmail.com
UseIMAPS yes
CertificateFile /etc/ssl/certs/ca-certificates.crt
Pass "secret"

IMAPStore gmail-store
Account gmail-account

IMAPAccount local-account
Host localhost
User username
Tunnel /usr/lib/dovecot/imap

IMAPStore local-store
Account local-account

Channel inbox-channel
Master :gmail-store:
Slave :local-store:
Patterns "*" !"[Google Mail]/*"
Create Both
Expunge Both

Channel spam-channel
Master :gmail-store:
Slave :local-store:
Patterns "[Google Mail]/Spam"
Create Both

Channel trash-channel
Master :gmail-store:
Slave :local-store:
Patterns "[Google Mail]/Bin"
Create Both

Channel sent-channel
Master :gmail-store:
Slave :local-store:
Patterns "[Google Mail]/Sent Mail"
Create Both

mail.conf

# modifications to /etc/dovecot/conf.d/10-mail.conf

mail_location = mdbox:~/Mail/mdbox

namespace inbox {

  # There can be only one INBOX, and this setting defines which namespace
  # has it.
  inbox = yes

}