Having problems sending email when using Outlook? Are others having problems emailing you from Outlook?

If you or a colleague has recently updated their email server, moved to a new email provider, changed to Hosted Exchange or a new email host, then may experience problems in either sending emails or receiving emails from other people.

This is because has a feature called “Auto-complete“. As you start typing a name, if that name has been used before it maybe automatically be suggested in a list (see above example).

The AutoSuggest/Auto-Complete feature of Outlook keeps a cache of addresses you’ve recently used.

As well as the email address, the cache also keeps details of the last sent to. If the server has changed, Outlook may not be able to send the email and may return an error.

In some cases Outlook may simply send the email, no error is returned, the email does not bounce but the recipient does not receive that email as it has been sent to the old email server.

If your are having issues emailing someone or other people are having problems emailing you, try deleting the email address from the Microsoft Outlook Auto-complete as follows:


Outlook for Windows 2010, 2013, 2016, 2019

In and /16/19, you can click on the X icon on the right side of the selected list item to delete it from the suggestion list (but not from the Suggested Contacts folder).

Another method, in Outlook 2010, is to remove the contact item from the Suggested Contacts folder. To see all your Contact folders, switch to the Contacts Navigation (keyboard shortcut: CTRL+3).

Another method:

  1. Select the unwanted name or e-mail address by using the UP ARROW or DOWN ARROW key.
  2. Press DELETE.

Then shut Outlook, reopen it, create a new email and type in the email address. Outlook should no longer find the old address details in the Autocomplete cache.

The version is slightly different to the Version. The Auto-Complete still provides suggestions via a drop-down list

Some entries that have errors can be removed by clicking on the “X” next to the name. For others, select the person.

Hover over the name with the cursor and a window appears, select the “Contact” icon

Once the Contact window appears, click on the “Delete” symbol to remove the entry. Click the “OK” button to confirm.

Close the window, create a new mail and type the email address as a new entry.

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2 comments to “Outlook E-mail Sending Issue Fix”

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  1. Adam L. - March 24, 2018 Reply

    Thanks for sharing the great information. My office, recently updated their email server, so I am also facing the same issue.

  2. Philip Morgan - November 13, 2018 Reply

    The issue which has been given here in the outlook has been faced by most of the users as it happens while making the synchronization of the emails to the outlook storage. There is also an error called connect error 10060 that also happens on the outlook as well.

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