Postfix stable release 3.8.0

[An on-line version of this announcement will be available at https://www.postfix.org/announcements/postfix-3.8.0.html]

Postfix stable release 3.8.0 is available. Postfix 3.4 - 3.7 will be updated soon; after that, Postfix 3.4 will no longer be updated.

The main changes are below. See the RELEASE_NOTES file for further details.

You can find the Postfix source code at the mirrors listed at https://www.postfix.org/.