I am getting interesting rejections from my clients mail server when sending a mail with indy-10's tidMessage component saying:
550 Rejected: Message does not contain a Message-ID
I get this even when using indy's own demo app
http://www.indyproject.org/DemoDownloads/Indy_10_MailClient.zip
what do I do to fix this. thanks!
TIdMessage in Indy 10 intentionally omits the 'Message-Id' header when encoding an email to a socket or TStream. You will have to use the TIdMessage.ExtraHeaders property, eg:
IdMessage1.MsgId := '...';
IdMessage1.ExtraHeaders.Values['Message-Id'] := IdMessage1.MsgId;
EDIT:
As a followup for this - TIdMessage
has now been updated with logic changes in how it handles the "Message-ID" and "In-Reply-To" headers:
The TIdMessage.MsgId
property now generates a "Message-ID" header regardless of whether the email is being saved, streamed, or transmitted. So you do not need to use the ExtraHeaders
property anymore.