https://pkg.go.dev/github.com/shogo-ma/mackerel-agent-plugins/mackerel-plugin-mailq/lib
mpmailq package - github.com/shogo-ma/mackerel-agent-plugins/mackerel-plugin-mailq/lib - Go Packages
https://us.archive.ubuntu.com/ubuntu/ubuntu/pool/universe/libp/libpostfix-parse-mailq-perl/?C=S;O=A
Index of /ubuntu/ubuntu/pool/universe/libp/libpostfix-parse-mailq-perl
index ofubuntupooluniverselibp
https://tempmailq.com/
Temp MailQ | TempMailQ
A fast and secure temporary email service. Stay away from spam, stay anonymous, create and use email with a single click.
tempmailq
https://manpages.ubuntu.com/manpages/resolute/man8/smtpctl.8.html
Ubuntu Manpage: smtpctl, mailq
ubuntumanpagemailq