Pop3c Mailbox Format

The pop3c storage accesses a remote POP3 server as if it were a regular (local) Dovecot mailbox format.

The remote POP3 mailbox is visible as the INBOX folder on the Dovecot side.

Settings

pop3c_features

Default	[None]
Value	string

A space-separated list of features, optimizations, and workarounds that can be enabled.

Workarounds:

no-pipelining

Prevents use of the PIPELINING extension even when it is advertised.

pop3c_host

Default	[None]
Value	string

The remote POP3 host to connect to.

pop3c_master_user

Default	[None]
Value	string
See Also	pop3c_password pop3c_user

The master username to authenticate as on the remote POP3 host.

To authenticate as a master user but use a separate login user, the following configuration should be employed, where the credentials are represented by masteruser and masteruser-secret:

pop3c_user = %u
pop3c_master_user = masteruser
pop3c_password = masteruser-secret

Mail user variables can be used.

pop3c_password

Default	[None]
Value	string
See Also	pop3c_master_user pop3c_user

The authentication password for the remote POP3 server.

If using master users, this setting will be the password of the master user.

pop3c_port

Default	110
Value	unsigned integer

The port on the remote POP3 host to connect to.

pop3c_quick_received_date

Default	no
Value	boolean

If enabled, pop3c doesn't require calling TOP for each message in order to get the metadata.

pop3c_rawlog_dir

Default	[None]
Value	string
See Also	rawlog

Log all POP3 traffic input/output to this directory.

pop3c_ssl

Default	no
Value	string
Allowed Values	nopop3sstarttls

Use TLS to connect to the remote POP3 server.

Value	Description
no	No TLS
pop3s	Explicitly connect to remote POP3 port using TLS
starttls	Use POP3 STARTTLS command to switch to TLS connection

pop3c_ssl_verify

Default	yes
Value	boolean
See Also	pop3c_ssl

Verify remote POP3 TLS certificate?

Verification may be disabled during testing, but should be enabled during production use.

Only used if pop3c_ssl is enabled.

pop3c_user

Default	%u
Value	string
See Also	pop3c_master_user pop3c_password

The user identity to be used for performing authentication to the source POP3 server.

Mail user variables can be used.

Configuration Example

Connect using STARTTLS to pop3.example.com:

# In-memory index files:
mail_location = pop3c:

# OR, Store index files locally:
#mail_location = pop3c:~/pop3c

pop3c_host = pop3.example.com
pop3c_password = secret
pop3c_port = 110
pop3c_ssl = starttls
pop3c_user = user@example.com