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Your IMAP server doesn't report read status back to the sender. Unless your e-mail provider is an advertiser *cough* Google *cough* the advertiser doesn't know
by giantrobot 5y ago
Your IMAP server doesn't report read status back to the sender. Unless your e-mail provider is an advertiser *cough* Google *cough* the advertiser doesn't know if you read a message just because the IMAP server marked it as read.
Also an IMAP server's read status doesn't mean someone manually interacted with an e-mail. If you mark messages as read in bulk, even if the provider reported that status to an advertiser, says nothing about engagement.
- jcranmer 5y agoYou can request a read receipt with emails, which will cause the MUA to send an email saying you've read the message (although I suspect most clients default to asking you if you want to send it before doing so).