The Mutt E-Mail Client : Reference : Configuration variables : tunnel
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## 6.3.261. tunnel

Type: string
Default: ""

Setting this variable will cause mutt to open a pipe to a command instead of a raw socket. You may be able to use this to set up preauthenticated connections to your IMAP/POP3 server. Example:

tunnel="ssh -q mailhost.net /usr/local/libexec/imapd"

NOTE: For this example to work you must be able to log in to the remote machine without having to enter a password.

The Mutt E-Mail Client : Reference : Configuration variables : tunnel
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Next: use_8bitmime