Re: is there a RFC which suggests that the helo name should be DNS resolvable

[Viktor Dukhovni]

On Wed, Jul 05, 2017 at 06:57:17PM +0200, Stefan Sticht wrote:

> Is there a RFC or similar which suggests/requires that the helo name should
> be DNS resolvable?

SMTP is defined in RFC 5321 (which obsoletes 2821 and 821).

-- 
        Viktor.