Download: http://www.courier-mta.org/download.html

Build 20180728 adds UTF-8 support to the POP3 server to complement the new UTF-8 support in the IMAP server, and also to Cone's POP3 client; fixes some Cone IMAP UTF-8 bugs; and adds a mostly complete UTF-8 support in the main Courier mail server.

POP3 servers don't use folders, but there might be a brief delay the first time a POP3 client connects to a POP3 server mailbox with a large number of messages, while the POP3 server rebuilds its persistent cache and flags UTF8 messages. The IMAP server checks each message's format on the fly, when the IMAP client requests it.

Implements most of the SMTPUTF8 extension, sufficient enough to exchange UTF8 mail with other UTF-8 capable mail servers, and deliver UTF-8 mail to POP3 and IMAP mailboxes. Courier will use and log international domain names in Unicode, internally, and use ASCII-compatible DNS queries, and pass through the mailbox portion of E-mail addresses in Unicode, when exchanging mail with other SMTPUTF8 mail servers.

Other changes since the last stable release:

- reformime: -rU option.

- reformime: fix crash due to an invalid -s option

- maildirmake: the -q option creates a new maildir if it does not exist.

- courier/courier-imap/cone: couriertls: GnuTLS: remove usage of deprecated
OpenPGP API. Adjust error logging to include the peer's IP address, where
available.

- maildrop: new :H pattern option matches only the main message headers, does
not match headers in the message's attachments, if any.

- courier: Change the format of the Received: header to comply with RFC 5322.

- all: updated packages with RPM build scripts for Fedora 28. Miscellaneous
fixes to fix diagnostics generated by aggressive warning compilation options
enabled in Fedora 28. Fix cone crashes on Fedora 28 caused by the additional
hardened build options. None of them were actual bugs.

- courier: fix makesmtpaccess to correctly handle IPv6 CIDR notation (if
Net::CIDR is installed)

- courier: remove hardcoded socket names from the sample mail filtering
modules, instead using their runtime name, as per the documented API.

- courier, courier-imap: change startup scripts so that encrypted connections
will run couriertls after dropping root privileges.

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