3 ms·
Prior art: http://tools.ietf.org/html/rfc821 http://tools.ietf.org/html/rfc821 (Section 3.4) Yes, there were systems that implemented this.
by bandy 15y ago
Prior art: http://tools.ietf.org/html/rfc821 http://tools.ietf.org/html/rfc821 (Section 3.4) Yes, there were systems that implemented this.