On Friday, March 14, 2014 1:38:53 PM CEST, Marc dirix wrote:
Maybe it is the same behaviour as with mailinglists on postfix?
If the To-field contains no domain, postfix tends to add it
automatically.
It isn't just Postfix, many MTAs do that.
"To: arnt" isn't legal syntax today, but it was legal a few decades ago and
quite commonly used for years after the syntax changed (in, IIRC, 1982) and
various MTAs still contains glue to support that. I think that's mostly a
bug these days. It landed on the wrong side of the fence when servers
learnt to distinguish between their own users (for whom they will relay)
and others.
Arnt
