[Users] The reply mark in subject (R: Re:) recognition

[Holger Berndt]

On Mi, 08.08.2012 16:12, Jerry wrote:

>> > That RFC recommends (!) the use of "Re: ". It clearly doesn't limit
>> > it to that.
>> > 
>> No, you are wrong Holger. The RFC says, that you can notify in the
>> subject line that this is a reply using "Re: ". But the notification
>> is optional, not how you notify.
>
>It states:
>
>When used in a reply, the field body MAY start with the string "Re: "
>
>"May" is not equal to "Can".

MAY (note the capitals) is defined in RFC 2119. It doesn't support
Michael's claim either.

Holger