If you have a problem with a message that keeps sending over and over (recipient gets multiple copies) but its not in your Outbox, its usually caused by an antivirus scanner add-in scanning outgoing messages. If you prefer to use OutlookSpy, instructions are at Delete Stuck Read Receipts using OutlookSpy. The advantage of using MFCMAPI is that it does not install a program, the exe runs without making changes to your computer and it does not require you to close and restart Outlook. (MDBVue is out-dated and we recommend using MFCMAPI or OutlookSpy.) Delete the hidden messages using MFCMAPI, OutlookSpy, or MDBVue.(Remember to change it back to the one you normally use for the account after they are sent.) Change the SMTP server for the account to a server you can access send.There are two methods that can be used to delete them:

They are stored as hidden messages at the root level of your mailbox. Still need help? Go to Microsoft Community.If you have hidden, unknown messages that won't send, it's most likely read receipts. UTC is one of several closely related successors to Greenwich Mean Time (GMT). UTC is the primary time standard by which the world regulates clocks and time. Because Microsoft 365 is a cloud service, and users can be in any one of 24 different time zones, the time stamp uses Coordinated Universal Time (UTC).įor example, if you're the sender and your time zone setting is set to (UTC-06:00) Central Time (US & Canada), you have to subtract 6 hours from the UTC time that's on the read receipt to reflect the time in your time zone. In Microsoft 365, the date and time of read receipts is based on the time zone setting of the Exchange Online server. Therefore, the read receipt displays the date and the time based on the time zone setting of the Exchange Online server. The time zone that's used to create the read receipt is taken from the Exchange Online server instead of from the client computer. Microsoft 365 doesn't have access to the time zone of the client computer.

For example, the read receipt shows a time zone of (UTC) Monrovia, Reykjavik. After the recipient reads the message, the read receipt that the sender receives displays a different time zone from the actual time zone setting of the sender. When a Microsoft 365 user sends an email message to another Microsoft 365 user by using Microsoft Outlook or Microsoft Outlook Web App, the message requests a read receipt.

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