MDN read receipts sent by Microsoft email services even though user chose not to do it / Preferences ignored
Categories
(Thunderbird :: Preferences, defect)
Tracking
(Not tracked)
People
(Reporter: jpugliese, Unassigned)
Details
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:104.0) Gecko/20100101 Firefox/104.0
Steps to reproduce:
Set in the preferences to "Ask" before send a read receipt and also set to not send read receipts. This are done as "Global Settings" and "Custom"
Actual results:
Read receipts are sent even though user not choose to do it. As the message is showed in pane the receipt is always sent.
Expected results:
Thunderbird must wait until the user choose to sent the read receipt or, if set in preferences to not send read receipts, no action shoud be taken.
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Comment 1•2 years ago
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For what provider? Are you using microsoft email services?
Yes Magnus. It is a Microsoft 365 e-mail service (IMAP, SMTP/s). Notice that this behaviour occours only when using Thunderbird (102.2.1 version, in my case). As soon as the message body is displayed the read receipt is sent.
Other email clients, like Outlook App or Outlook Web do it right and asks before sending a read receipt.
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Comment 3•2 years ago
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It's a Microsoft "feature". As soon as the mail is downloaded the server sends a return receipt. Thunderbird isn't involved in that. If you examine the notification looks like, you'll see it is not sent by Thunderbird.
Thanks for the information Magnus. I'll seek for more about this issue.
(In reply to Magnus Melin [:mkmelin] from comment #3)
Thunderbird isn't involved in that.
If so, how is it possible that
Other email clients, like Outlook App […] do it right and asks before sending a read receipt.
?
If Outlook (or maybe even "other email clients") can do it, why can't Thunderbird ?
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Comment 7•4 months ago
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The "feature" is documented somewhere on Microsoft's sites.
The web client obviously does not download the message. For other access, who knows... internal code.
Description
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