Authentication via remote IMAP server

Available driver settings:

• host=<template> : IP address or hostname. Allows %variables (e.g. host=imap.%d)

• port=<port>

• username=<template> : The default is %u, but this could be changed to for example %n@example.com

• ssl=imaps / ssl=starttls

• ssl_ca_dir=<path>

  New in version v2.2.30.

• ssl_ca_file=<path>

• allow_invalid_cert=yes|no : Whether to allow authentication even if the certificate isn’t trusted. For v2.2 it defaults to “yes”. (v2.2.30+)

• rawlog_dir=<path>

See also Dovecot imapc proxy for how to combine this with imapc storage.

Example

Authenticates users against remote IMAP server in IP address 192.168.1.123:

passdb {
  driver = imap
  args = host=192.168.1.123
}