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FastMail Forum All posts relating to FastMail.FM should go here: suggestions, comments, requests for help, complaints, technical issues etc. |
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30 Jan 2021, 07:18 AM | #16 | ||
Essential Contributor
Join Date: Jan 2017
Posts: 278
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Quote:
Quote:
Years ago FM used to deliver a single version of each email, so headers like X-Delivered-to could not be added if there were multiple local recipients. You had to use the combination ["x-delivered-to","Cc","To"] to maximize the number of correct matches and even then it wasn't fully reliable. These days emails with multiple recipients are converted into separate instances, and X-Delivered-to is reliable. I just use that for the recipient address. |
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