Hi SM,
On 10/02/2017 10:46 AM, S Moonesamy wrote:
>
> In the message which you sent, there was an email header which might or
> might not be compliant with the technical standard(s) used by the
> Mauritius Revenue Authority. The subject line says "violates hostname
> convention". However, the message does not contain any information
> about the hostname convention or how it is being violated.
>
I used the "tweet content" as subject line for the email. Honestly, I
did not dig further more than just checking the email header about the
underscore use that was tweeted about.
Section 4.1.2 of RFC 5321 says:
« To promote interoperability and consistent with long-standing
guidance about conservative use of the DNS in naming and
applications (e.g., see Section 2.3.1 of the base DNS document, RFC
1035 [2]), characters outside the set of alphabetic characters,
digits, and hyphen MUST NOT appear in domain name labels for SMTP
clients or servers. »
As per the above isn't the use of domain "mra_esa1.mra.mu" in contrast
with the guidance mentioned.
Regards,
Ish Sookun
Received on Mon Oct 02 2017 - 12:10:23 PST