Microsoft Outlook For Mac Error Code 3253

Hi mpperkins1111, Based on my research, this kind of error message indicates some temporary connection problem with the mail server. Since the issue occurred suddenly, I’d like to confirm if you’ve made any changes to your account or upgraded the Office client before the issue occurred. Moreover, I’d like to collect the following information to further investigate the issue: 1. Please provide the detailed version of Outlook for Mac you are using. On the top bar, click Outlook > About Outlook to check the Outlook version, it looks like 15.34 (170419).

Hi I have recently purchased Microsoft Office for Mac and set up Outlook, I can receive emails but not send them, I have never been able to send in Outlook. Mail works fine and I have had to open Mail to send emails. I am using a Telstra email. I have continually received the 3253 message.

A screenshot of the error message. Are you using an Office 365 account or other types of account when the issue happened? How did you set up your account in Outlook 2016 for Mac? Via Exchange or IMAP/POP? Wd my passport for mac software.

Could you log into your account via web browser and send emails without any problem? Hi All, I understand all of you are experiencing the same error in Outlook 2016 for Mac and thanks for posting in our forum. However, it’s kind of difficult for us to troubleshoot the issue for three customers at the same time in a single thread, not to mention the account and the detailed version of Outlook 2016 for Mac client you are using might be different. Given the situation, @LouGarfinkle, I recommend you work with my colleague in the to try to get the issue resolved. @KimLumsden, I’ve split one of your duplicate posts to a separate and our engineer is actively working on the case for you.

We appreciate your time and cooperation. @mpperkins1111, thanks for the detailed version of Outlook 2016 for Mac provided. I have run some tests in the same version but couldn’t reproduce the same error as you. Then I have done some research and found that this issue may be related to the large storage of your sent items folder. Therefore, please try moving some of the old emails in the Sent items folder to a new folder and check if it helps.

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Moreover, could you answer the rest of the questions mentioned in my initial reply so we can better understand the situation and move forward with the issue? To insert pictures, please use the 'Insert image' button in the reply window.

Regards, Sam.

Email is a very important communication tool. You use it for personal correspondence with your family and friends but most importantly, you use it for work correspondence with your team for projects and other business-related deals. So it is not a good feeling when you suddenly get email-related errors.