On 03 Jan 2018, at 04:57, Matus UHLAR - fantomas <uh...@fantomas.sk> wrote: > while it's "only" recommended that the right part is a domain name, but > there must be right part.
Yes, there must be a left and a right and an ‘@‘ in-between. On 03 Jan 2018, at 12:36, Bill Cole <sausers-20150...@billmail.scconsult.com> wrote: > About 1.5% of my personal non-spam email over the past 20 years has had > "localhost" as the right hand side of the MID. This implies a de facto RFC > violation because it poses a real risk of duplication. There is no requirement that the right side be globally unique, just that the entire message ID is globally unique. > An additional ~1% has a MID header with either no dots or no '@'. Dots are irrelevant, but the way I read the RFC, ‘@‘ is required. -- No Sigs. Blame Apple.
