Local mail delivery needs write access to /var/mail to create lock files. Evolution has an sgid helper for that (libexec/camel-lock-helper*) however on freebsd it's group owner is "wheel" while /var/mail has group owner "mail". Executing `chgrp mail /usr/local/libexec/camel-lock-helper*` fixes that.
A commit references this bug: Author: kwm Date: Thu Aug 6 11:42:05 UTC 2015 New revision: 393653 URL: https://svnweb.freebsd.org/changeset/ports/393653 Log: Make the camel-lock-helper-1.2 application part of the mail group and set sgid. This allows evolution do do local mail delivery again. PR: 202119 Submitted by: mwisnicki+freebsd@gmail.com Changes: head/databases/evolution-data-server/Makefile head/databases/evolution-data-server/pkg-plist
Thanks!