Created attachment 221706 [details]
security/libressl cannot be used as a dependency because it'd make future port builds use libressl instead of base openssl. So, use libtls from libretls.
Sorry for the delay in getting back to you. LGTM!
A commit references this bug:
Date: Sun Feb 7 23:40:48 UTC 2021
New revision: 564666
mail/mpop: decouple LIBTLS from LibreSSL
Submitted by: jbeich