read receipt of mails sent
How to mark a mail being sent to record a "read receipt" by the addressee. i.e.Return Confirmation of the addressee having read the mail sent.
How to mark a mail being sent to record a "read receipt" by the addressee. i.e.Return Confirmation of the addressee having read the mail sent.
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Firefox has no email features. Any email accessed through Firefox will be a web mail based service, and any email features will be part of the web mail service. You need to check with the support for the email service that you are using to see if they have this feature.