POP3 man page on Plan9

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POP3(8)								       POP3(8)

       pop3, imap4d - Internet mail servers

       upas/pop3 [ -d debugfile ][ -a mailbox ][ -r peeraddr ][ -t tlscertfile
       ][ -p ]

       ip/imap4d [-acpv] [-d smtpdomain] [-s servername]

       These programs support remote access to mail across the Internet.   All
       expect  the network connection to be standard input, output, and error.
       They are normally started from scripts  in  /rc/bin/service  (see  lis‐

       Pop3  provides access to a user's mailboxes via the POP3 protocol.  The
       options are:

       -d  create debugfile and write debugging output to it

       -a  causes pop3 to assume that it it already authenticated and to  read
	   mailbox immediately

       -r  causes  pop3 to create the file /mail/ratify/trusted/peeraddr#32 to
	   allow subsequent SMTP sessions from that address.  See ratfs(4) for

       -t  get the local TLS certificate from the file tlscertfile.

       -p  allow passwords in the clear for authenticating the connection

       Imap4d  provides	 access to a user's mailboxes via the IMAP4rev1 proto‐
       col.  Only files rooted in  /mail/box/username/	are  accessible.   The
       list   of   subscribed	mailboxes   is	contained  in  /mail/box/user‐
       name/imap.subscribed, and initially contains only  INBOX,  IMAP's  name
       for  the	 user's	 mailbox.   A shadow file, mailbox.imp, is created for
       each mailbox examined.

       Imap4d's options are:

       a   Assume the user is already authenticated.   By  default,  the  user
	   must authenticate using CRAM-MD5 or securenet(8) challenge/response

       c   Allow plan 9 challenge response authentication.

       p   Allow login authentication.	This option should only be enabled for
	   servers  using  an  encrypted  connection,  such  as	 SSL, and when
	   enabled,  all  non-encrypted	 connections  should  be   disallowed.
	   Imap4d does not enforce this policy.

       v   Turn on verbose output to the debug file.

       s   The server's name.  If none is provided, cs (see ndb(8)) is queried
	   or /env/sysname is used.

       d   The local mail domain.  Defaults to the  server  /env/site  in  the
	   mail server's domain.

       For both imap4d and pop3, the password used to authenticate the connec‐
       tion is the APOP secret held by keyfs(4) running on the	authentication

	      debugging output





       aliasmail(8),  faces(1), filter(1), mail(1), marshal(1), mlmgr(1), ned‐
       mail(1), qer(8), rewrite(6), send(8), upasfs(4)

       Usually messages flagged	 for  deletion	with  DELE  are	 not  actually
       deleted	until the client sends a QUIT command to end the conversation.
       Pop3 implements a  non-standard	command	 SYNC  that  deletes  messages
       flagged for deletion without ending the conversation.

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