by rendx 1 year ago

> unconventional Google-filing trick

Documented as "subadressing" in RFC 5233, and the default for both sendmail and postfix, amongst others. As such, often 'accidentially' supported by many mail providers even when undocumented. Google didn't introduce them, nor are they 'unconventional'.

https://www.rfc-editor.org/rfc/rfc5233