Re: Message-ID practical maximum size

> My math is:
>
>     998          one unfolded line
>   -  12          "Message-ID: "
>   -   3          "<" and "@" and ">"
>   - 255          maximum domain name length (actually 254 but...)
>  --------
>   = 728 octets   safest maximum left-hand size
The space at the end of "Message-ID: " is optional, so make it 729 pctets.

--lyndon