B4X

Auto-Generate or Explicitly Specify the Message-ID Email Header

Demonstrates how to auto-generate or explicitly specify the Message-ID header field. B4X

Dim success As Boolean = False

Dim email As ChilkatEmail
email.Initialize

email.Subject = "test"
email.Body = "test"
email.AddTo("Joe", "joe@example1.com")
email.From = "mary@example2.com"

Dim mailman As ChilkatMailMan
mailman.Initialize("mailman")

'  When the mailman sends email, it renders the email to be sent,
'  and then sends the rendered MIME.

'  Instead of actually sending the email, this example will render
'  to MIME so we can see what would be sent..

'  We can explicitly set the Message-ID like this:
mailman.AutoGenMessageId = False
email.AddHeaderField("Message-ID", "<xyz123@abc>")

Dim mimeStr As String = mailman.RenderToMime(email)
Log(mimeStr)

'  This is what we get:

'  MIME-Version: 1.0
'  Date: Mon, 20 Jul 2020 17:20:09 -0500
'  Message-ID: <xyz123@abc>
'  Content-Type: text/plain; charset=us-ascii; format=flowed
'  Content-Transfer-Encoding: 7bit
'  X-Priority: 3 (Normal)
'  Subject: test
'  To: Joe <joe@example1.com>
'  From: mary@example2.com
'  
'  test

Log("--------")

'  If we auto-generate...
mailman.AutoGenMessageId = True
mimeStr = mailman.RenderToMime(email)
Log(mimeStr)

'  We get this:

'  MIME-Version: 1.0
'  Date: Mon, 20 Jul 2020 17:21:20 -0500
'  Message-ID: <04EDE096BBFE484967F6398A973B0FCF6EA09A44@CHILKATSLICE>
'  Content-Type: text/plain; charset=us-ascii; format=flowed
'  Content-Transfer-Encoding: 7bit
'  X-Priority: 3 (Normal)
'  Subject: test
'  To: Joe <joe@example1.com>
'  From: mary@example2.com
'  
'  test