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Outlook email connection error.

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No avatar asked by (120 points) about Microsoft Office Outlook
edited by

I have an account that normally works with my Outlook 360 account. All of a sudden I started getting the attached error message whenever I try to send an email. I went into Outlook Account Settings to confirm that the password hadn't been changed or corrupted, and when I hit "OK" the email goes through just fine. So my settings seem OK. What is causing this and what can I do to fix it?

1 Answer

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No avatar answered by (193k points)

There are a few causes to this issue and most of them are related to:

  • client configuration (settings, ports, password, firewall)
  • exceeded quota for the email (Many email services only allow a certain file size that can be sent. You should check the size of the attachment)
  • account block (Even if the email works fine, contact the system administrator or get in touch with support for the email service where you have an account)

I also advise checking the latest settings for the email service you're using. Many people forget to update the settings for security, ports, passwords, etc.

Also use the official Outlook Fix Issues page to overcome this error: https://support.office.com/en-gb/article/Fix-Outlook-Problems-b3e740b9-171d-4179-bcd1-e279a363fa75

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