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A blog about Ruby, Rails and other Tech. Mostly.
Back to blog| 27th Jul 2006, 7:08pm |
Manuel Holtgrewe wrote to me, and pointed me to his weblog where he notes the real cause of ActionMailer throwing away the Content-Id headers:
Mail uses its MessageIdHeader class to represent Content-Id headers. This class does some validation and is also used for the Message-Id header. Can you smell the problem already? Message ids must look like somestring@host but you would not assume that you have to format your content ids this way. If you format your Content-Id headers any other way then TMail will simply kick them out (I guess it throws some syntax errors but Rails is swallowing them silently).
So stick a @ in there, and all will be well.
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