

Moreover, if the issue doesn't persist in the web mail app, regarding "Version 16.18 (180903)", you are using Outlook Insider fast version, right? As the current of Outlook Insider fast is versionġ6.18 (18091500), please update your Outlook client to check this issue. If the sent email is duplicated in the web mail app, then it is suggested to check the settings of your gmail accountĪnd contact gmail support team to further troubleshoot this issue. To troubleshoot this issue, please make sure you don't select the option “keeping a copy of sent items” in Outlook for Mac > Accounts > select your Gmail account > Advanced > Folders, like below picture:Īlso, to confirm whether this issue is related to Outlook client or your account, please try to send a test email in your web mail app. Thanks for post your question in our forum.
