The official release (v0.2.0) sendmail binary is compiled with a version of Go <1.8 which means it doesn't respect the resolvconf option options ndots:0 when performing DNS lookups.
I'd like to bump this ticket as sending a email now throws an exception on Mac.
It occurred on macOS Catalina (10.15.6), PHP 7.4 and was fixed by recompiling the binary with the latest version.
The official release (v0.2.0) sendmail binary is compiled with a version of Go <1.8 which means it doesn't respect the resolvconf option options ndots:0 when performing DNS lookups.
https://groups.google.com/forum/#!msg/golang-codereviews/aSIWRSuuwDE/hRvAKeoHAwAJ
It's possible to re-compile it and publish with the latest version please?