How to Fix Outlook Mac Error Code 3253

Lately, Mac users reported having problems while using Outlook on their computers. Whenever the users try to send a mail, they continuously get an Error code 3252 with the message saying “Connection to the Server failed or was dropped.” This Error restricts Mac Outlook users from sending emails, while they are still able to receive emails. After hitting the send button, the emails go to the outgoing box. But they stay there with a forever-pending status and the code error 3253. What is even more frustrating is the fact that this error occurs suddenly, without giving you any warning. That leaves you clueless about the reasons why this error happens and how can you solve it.

An error like these can create a hurdle in your email communication. In fact, it can affect the overall productivity of your business in a significant way if not solved properly. After a little research, we found a method that fixes this problem successfully. In this article, you can find the steps for performing that method which can solve the Outlook error code 3252 on your Mac.

The Cause For Outlook Mac Error Code 3253

Before performing the steps for solving the problem let’s look at the responsible factors that occur the 3253 error. It usually happens at the time of failed connection to the server. That generates an issue for the user who wants to send emails.

The huge number of sent emails may be one possible reason why the 3253 error happens. Having a large sent emails folder puts additional stress on the server-client communication and may result with disconnections.

Another cause may also be the inaccurate setup of Outlook account on the client’s computer. However, this may be easily fixed by entering the right information.

The cause that is most likely happens in the majority of cases is a damaged or corrupted Outlook for Mac.

No matter what the cause for your Outlook 3253 error is, in the next part you can find the working solution that helped many of our readers. So, it could also help you in solving the Outlook error.

Outlook Mac Error Code 3253 – Solution

To fix the Outlook error code 3253 on your Mac follow the steps below.

  1. Open the Terminal app on your Mac. You can do it by clicking the Spotlight search glass at the top right corner and typing terminal.
  2. Now typedefaults delete com.microsoft.Outlook” without the quotes in Terminal. This command will delete your old Outlook preferences.
  3. Typekillall cfprefsd” without the quotes in Terminal. This will kill the cached preferences.
  4. And finally, Launch Outlook.

In order try to test if the method worked, try sending a mail from your Outlook. It should work without any problems.

Final Words

Outlook is a highly used email platform and is available for various operating systems. Numerous users access their emails on Outlook for Mac, and having a seamless experience using this email client is a must-have. The Appauls team always focus on solving various problems our readers report. So, if you are facing the Outlook error code 3253, feel free to try this method and share your experience in the comment section below. Additionally, if you are aware of another fix for this problem do not be shy to share it with us.

ABOUT THE AUTHOR

Kevin Arrows


Kevin Arrows is a highly experienced and knowledgeable technology specialist with over a decade of industry experience. He holds a Microsoft Certified Technology Specialist (MCTS) certification and has a deep passion for staying up-to-date on the latest tech developments. Kevin has written extensively on a wide range of tech-related topics, showcasing his expertise and knowledge in areas such as software development, cybersecurity, and cloud computing. His contributions to the tech field have been widely recognized and respected by his peers, and he is highly regarded for his ability to explain complex technical concepts in a clear and concise manner.

Comments

16
    SY
    Sylvia Oct 5, 2018

    Worked like charm, thx for the quick and easy solution!!

    CG
    Csonkaréti Gergely Dec 5, 2018

    Unfortunately it did not work for me. 🙁

    AP
    Alan Pavletta Mar 6, 2019

    This command (defaults delete com.microsoft.Outlook) in Terminal fix my problem with sending e-mails! Thank you so much!

    CY
    Chu Yuet May 24, 2019

    did not work too. sobs..

      SW
      Shane Warren Author May 25, 2019

      inside Outlook Help – >Check for updates
      Download and apply all updates for Office products, not just Outlook.
      Outlook 15.34 is the current at the time of this post
      Close Outlook for the installation
      Open Outlook
      Edit your connection settings – Outlook > Preferences > Accounts
      Find your mail profile with the issue
      Check the spelling of your incoming and outgoing mail servers – EG mail.domain.com
      Tick the “Use SSL” for incoming and out
      Check the ports are 993 and 465
      If they are not as above, click the override tick box and type them in – 993 and 465
      It doesn’t matter if your mail server accepts secure connections or not, it will try to connect securely then fall back to insecure port 25 if needed.
      Click More settings button
      Authentication – Use incoming settings
      Ok back to the main screen
      Click send n receive
      Accept any certificate popups – Yes trust type messages
      (Taken from a windows forum)

        RO
        Robbie Nov 12, 2021

        This eventually worked for me but only after then using disk utility to check the disc, do a restart, launch Outlook and go and uncheck the override ports box. Fantastic though and thanks for the guide. Time to upgrade to Big Sur I think and possible move back to Apple mail

        Reply
    TH
    Tony Harmsworth Oct 17, 2019

    Didn’t have any effect at all. Off more than 24 hours now. Diabolical

      SW
      Shane Warren Author Oct 17, 2019

      Have you tried this:
      “inside Outlook Help – >Check for updates
      Download and apply all updates for Office products, not just Outlook.
      Outlook 15.34 is the current at the time of this post
      Close Outlook for the installation
      Open Outlook
      Edit your connection settings – Outlook > Preferences > Accounts
      Find your mail profile with the issue
      Check the spelling of your incoming and outgoing mail servers – EG mail.domain.com
      Tick the “Use SSL” for incoming and out
      Check the ports are 993 and 465
      If they are not as above, click the override tick box and type them in – 993 and 465
      It doesn’t matter if your mail server accepts secure connections or not, it will try to connect securely then fall back to insecure port 25 if needed.
      Click More settings button
      Authentication – Use incoming settings
      Ok back to the main screen
      Click send n receive
      Accept any certificate popups – Yes trust type messages”

        TH
        Tony Harmsworth Oct 17, 2019

        Done all that several times. Still no email being sent. Got on to 4techies and they wanted £99 to solve it for me. Ha!

          SW
          Shane Warren Author Oct 17, 2019

          Seems odd, doing all this usually seems to solve this problem for most users. You might have to get in touch with Customer support

    RR
    R R Dec 20, 2019

    Followed what you suggested and it seems to work for me. Thanks.

    RH
    Rakesh Hansalia Apr 4, 2020

    I did NOT work for me, I’m using MacBook Pro (macOS Sierra) V.10.12.6.

    SW
    Shane Warren Author Apr 4, 2020

    Consider trying the following:
    :inside Outlook Help – >Check for updates
    Download and apply all updates for Office products, not just Outlook.
    Outlook 15.34 is the current at the time of this post
    Close Outlook for the installation
    Open Outlook
    Edit your connection settings – Outlook > Preferences > Accounts
    Find your mail profile with the issue
    Check the spelling of your incoming and outgoing mail servers – EG mail.domain.com
    Tick the “Use SSL” for incoming and out
    Check the ports are 993 and 465
    If they are not as above, click the override tick box and type them in – 993 and 465
    It doesn’t matter if your mail server accepts secure connections or not, it will try to connect securely then fall back to insecure port 25 if needed.
    Click More settings button
    Authentication – Use incoming settings
    Ok back to the main screen
    Click send n receive
    Accept any certificate popups – Yes trust type messages”

    NF
    North Face Apr 8, 2020

    Thank you! Its working well!

    RA
    RAA Mar 6, 2022

    does this fix affect the other email accounts you have setup in Outlook, such as Verizon, Operamail, Aol, etc.?

      MZ
      Muhammad Zubyan Author Mar 8, 2022

      I don’t think so but you can try and let me know how it goes.