Request for Change: sendmail headers

[UBWH]

Thanks to @gemu2015, sendmail [] is working again in V13.2.0

I sent myself an email and this is the header on the received side

From: "Tasmota2" <[email protected]>
To: "user1" <[email protected]>
Subject: alarm
Message-ID: <[email protected]>

FROM

I can see from the code this is FriendlyName1 <email address>.
It might be better if this was topic <email address>
In my case: solar_06C6B8 <email address>

I agree this is a VERY minor point.

TO

The user1 is hard coded in xdrv_01_2_webserver_esp32_mail.ino
message.addRecipient("user1", to);

It would be better if user1 was replaced with either:

• the full email address [email protected] in my case, or
• just the user part of the email address: clark in my case

Message-ID

The relevant RFC for SNMP states:

   The "Message-ID:" field contains a single unique message identifier.
   The "References:" and "In-Reply-To:" fields each contain one or more
   unique message identifiers, optionally separated by CFWS.

   The message identifier (msg-id) syntax is a limited version of the
   addr-spec construct enclosed in the angle bracket characters, "<" and
   ">".  Unlike addr-spec, this syntax only permits the dot-atom-text
   form on the left-hand side of the "@" and does not have internal CFWS
   anywhere in the message identifier.

An example of an RFC compliant Message-ID is:

Message-ID: <[email protected]>

The Message-ID issued by sendmail [] is not compliant as it is not unique. Maybe it could be:

• <timestamp@topic>
• <randomnumber@topic>
• e.g. <1234567@solar_06C6B8>