Hi, I was trying to build a completely unrelated Arch docker image that was failing due to it being unable to build ucspi-tcp, and I stumbled across your fork. I was able to build ucspi-tcp, and it's dependency libqmail (your fork) using the ./create_archpkg script.
I basically spent the entire weekend trying to get a working build, and your fork is the only thing I found that I could build, so:
"When using the SASL SCRAM mechanism, the SCRAM-SHA-256-PLUS variant SHOULD be preferred over the SCRAM-SHA-256 variant, and SHA-256 variants [RFC7677] SHOULD be preferred over SHA-1 variants [RFC5802]".