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diff --git a/Documentation/public-inbox-pop3d.pod b/Documentation/public-inbox-pop3d.pod new file mode 100644 index 00000000..fb16fb96 --- /dev/null +++ b/Documentation/public-inbox-pop3d.pod @@ -0,0 +1,122 @@ +=head1 NAME + +public-inbox-pop3d - POP3 server for sharing public-inboxes + +=head1 SYNOPSIS + + public-inbox-pop3d [OPTIONS] + +=head1 DESCRIPTION + +public-inbox-pop3d provides a POP3 daemon for public-inbox. +It uses options and environment variables common to all +read-only L<public-inbox-daemon(8)> implementations, +but requires additional read-write storage to keep track +of deleted messages on a per-user basis. + +Like L<public-inbox-imapd(1)>, C<public-inbox-pop3d> will never +require write access to the directory where the public-inboxes +are stored. + +It is designed for anonymous access, thus the password is +always C<anonymous> (all lower-case). + +Usernames are of the format: + + C<$UUID@$NEWSGROUP_NAME> + +Where C<$UUID> is the output of the L<uuidgen(1)> command. Dash +(C<->) characters in UUIDs are ignored, and C<[A-F]> hex +characters are case-insensitive. Users should keep their UUIDs +private to prevent others from deleting unretrieved messages. +Users may switch to a new UUID at any time to retrieve +previously-retrieved messages. + +Historical slices of 50K messages are available +by suffixing the integer L<$SLICE>, where C<0> is the oldest. + + C<$UUID@$NEWSGROUP_NAME.$SLICE> + +It may be run as a different user than the user running +L<public-inbox-watch(1)>, L<public-inbox-mda(1)>, or +L<public-inbox-fetch(1)>. + +To save storage, L</publicinbox.pop3state> only stores +the highest-numbered deleted message + +=head1 OPTIONS + +See common options in L<public-inbox-daemon(8)/OPTIONS>. + +=over + +=item -l PROTOCOL://ADDRESS/?cert=/path/to/cert,key=/path/to/key + +=item --listen PROTOCOL://ADDRESS/?cert=/path/to/cert,key=/path/to/key + +In addition to the normal C<-l>/C<--listen> switch described in +L<public-inbox-daemon(8)>, the C<PROTOCOL> prefix (e.g. C<pop3://> or +C<pop3s://>) may be specified to force a given protocol. + +For STARTTLS and POP3S support, the C<cert> and C<key> may be specified +on a per-listener basis after a C<?> character and separated by C<,>. +These directives are per-directive, and it's possible to use a different +cert for every listener. + +=item --cert /path/to/cert + +The default TLS certificate for optional STARTTLS and POP3S support +if the C<cert> option is not given with C<--listen>. + +If using systemd-compatible socket activation and a TCP listener on port +995 is inherited, it is automatically POP3S when this option is given. +When a listener on port 110 is inherited and this option is given, it +automatically gets STARTTLS support. + +=item --key /path/to/key + +The default private TLS certificate key for optional STARTTLS and POP3S +support if the C<key> option is not given with C<--listen>. The private +key may be concatenated into the path used by C<--cert>, in which case this +option is not needed. + +=back + +=head1 CONFIGURATION + +Aside from C<publicinbox.pop3state>, C<public-inbox-pop3d> uses the +same configuration knobs as L<public-inbox-nntpd(1)>, +see L<public-inbox-nntpd(1)> and L<public-inbox-config(5)>. + +=over 8 + +=item publicInbox.pop3state + +A directory containing per-user/mailbox account information; +must be writable to the C<public-inbox-pop3d> process. + +=item publicInbox.<name>.newsgroup + +The newsgroup name maps to a POP3 folder name. + +=back + +=head1 CONTACT + +Feedback welcome via plain-text mail to L<mailto:meta@public-inbox.org> + +The mail archives are hosted at L<https://public-inbox.org/meta/>, and +L<nntp://news.public-inbox.org/inbox.comp.mail.public-inbox.meta>, +L<nntp://4uok3hntl7oi7b4uf4rtfwefqeexfzil2w6kgk2jn5z2f764irre7byd.onion/inbox.comp.mail.public-inbox.meta> + +=head1 COPYRIGHT + +Copyright all contributors L<mailto:meta@public-inbox.org> + +License: AGPL-3.0+ L<https://www.gnu.org/licenses/agpl-3.0.txt> + +=head1 SEE ALSO + +L<git(1)>, L<git-config(1)>, L<public-inbox-daemon(8)>, +L<public-inbox-config(5)>, L<public-inbox-nntpd(1)>, +L<uuidgen(1)> |