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"email no longer valid" error when trying to send emails

Anonymous
2020-02-09T01:09:14+00:00

When I try to send an email to and address I use frequently (and has not changed) I get a message saying the email cannot be sent because the address in no longer valid:

"We won't be able to deliver this message to (email address) because the email address is not longer valid"

when I test this address on a web email instead of outlook, the email works just fine!

Outlook | Windows | Classic Outlook for Windows | For home

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  1. Anonymous
    2020-02-09T03:58:59+00:00

    Hello KLAhillsboro,

    Thanks for offering us details about your issue here. Based on the error message you offered, at first, please check whether the email address of the recipient that you are sending to is spelled correctly. If it is correct, based on the researches I did, this issue might also be related to cache of Outlook client. You could try to disable and re-enable cache mode of Outlook via clicking File > Account Settings > Account Settings and select your account, then unselect/select check box next to “Use Cached Exchange Mode to download email to an Outlook data file”, remember to restart Outlook client to make it take effect immediately.

    If issue still exists, I recommend you check whether the version of Outlook is latest, if not, please update it to be up to date for better using experience. To update it, just click File > Office Account > Update Options > Update Now.

    If you still cannot send email successfully in Outlook client, in order to help you better, please offer me following information for further analysis.

    1. Before the issue happened, have you modified anything? Such as adding add-in or updating.
    2. The version of Outlook client. Click File > Office Account and collect it next to About Outlook icon.
    3. Can you send email to other recipient in Outlook client?

    Best Regards,

    Betty

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  1. Anonymous
    2020-02-09T04:41:18+00:00

    installing updates seemed to have been the answer.

    thank you

    5 people found this answer helpful.
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