The setting of the FOLDER-COLLECTIONS option can be a list of
    values, where each value specifies a folder or folders on the
    local system or accessible via an IMAP server, or specifies the
    new mail folder accessible via a POP3 server. Folders on the
    local system or accessible via an IMAP server are specified using
    the format:

 optional-label {imaphost}optional-file[view]

    or

 optional-label {imaphost:port/user=username}optional-file[view]

    OPTIONAL-LABEL is a label which will be displayed by Pine in
    place of the full name of the folder collection.

    The optional field IMAPHOST is the name of a host where the
    mail file resides. IMAPHOST can be any system which has an IMAP4
    server, and need not necessarily be an OpenVMS system.

    The optional PORT specification can be included if you want to
    connect to a port other than the default (for IMAP) of 143.

    The optional USERNAME can be included if you want to log in to
    the IMAPHOST under a different account name.

    The optional field OPTIONAL-FILE is the file specification
    of a mail file. If OPTIONAL-FILE is omitted but IMAP-HOST is
    specified, then the default mail file on the remote IMAPHOST
    system will be used. If neither OPTIONAL-FILE nor IMAP-HOST is
    specified, then your local default mail file will be used.

    When OPTIONAL-FILE is specified for an OpenVMS host locally or
    remotely running PMDF's legacy IMAP server, it must have the
    format

    #disk:<directory>mailfile.mai#

    where DISK, DIRECTORY, and MAILFILE.MAI specify the full path,
    disk, directory, and file name, to the mail file. For instance,
    to select the mail file MEMOS.MAI of DISK$USER1:[BOB], you would
    specify

    #DISK\$USER1:<BOB>MEMOS.MAI#

    Finally, the VIEW field controls which folders from the mail file
    are part of the collection. If specified as being empty, [],
    then all folders from the mail file are treated as part of the
    collection. Wild cards can be used to select folders matching a
    pattern. For example, [INFO-*] would select all folders beginning
    with the string INFO- from the mail file. Again, note that folder
    names are considered to be case sensitive.

    For POP3 access to a new mail folder on a remote system, the
    format is:

    "foldername" {pop3host/POP3}INBOX

    or

    "foldername" {pop3host/POP3/USER=username}INBOX

    where FOLDERNAME is the name by which Pine will refer to the
    folder, POP3HOST is the name of the system running the POP3
    server, and USERNAME is the name under which to log in to the
    remote POP3 server.