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Your incoming (POP3) e-mail server has reported an internal error. The Server responded: -ERR unavailable. 21

Hello,

i am using free outlook.com email since 2012 (*** Email address is removed for privacy ***), used 8 years without any hurdle but from 17-02-2020 my MS Outlook is unable to pop the emails from outlook.com (sending of emails is working fine) (only incoming emails aren't working).

i am using MS Outlook 2010.

i tried almost all possible options/settings to get it solved but unfortunately couldn't succeed.

i am getting following (underlined) error while i am clinking send&receive:

Your incoming (POP3) e-mail server has reported an internal error. If you continue to receive this message, contact your server administrator or Internet service provider (ISP). The Server responded: -ERR unavailable. 21


Hoping for a speedy response,
Many thanks in advance,

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Hi Z@!D,

I'm Anna, an Outlook.com user like you, and an independent advisor.

I found an article that has similar error you were getting, you may want to try the suggested solution.

https://answers.microsoft.com/en-us/msoffice/fo...

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Hi Anna,

Thanks for your reply..
i am able to send&receive emails via webmail.

via MS Outlook 2010 i am only able to send (unable to receive). This is my concern...

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You may want to try the suggested solution here https://answers.microsoft.com/en-us/msoffice/fo...

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Thanks Anna,

I tried by disabling Firewall and AntiVirus... nothing worked.

I tried in different system by creating new profile / pst, couldn't succeed.

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I’m sorry I can’t find other option. Let’s see with other experts!

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Hello,

I’m Mel. I'm an Outlook user, and an Independent Advisor. I'd be glad to provide additional assistance for this issue. I'd like to ask the following questions in order to assist you further:

Have you checked if you can receive emails when you log in your account to Outlook.com online using the web browser on your computer?

Have you already removed and re-setup your email account in Outlook 2010 app?

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I’m sorry I can’t find other option. Let’s see with other experts!
Thanks Anna, appreciate your concern... 

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Hello,

I’m Mel. I'm an Outlook user, and an Independent Advisor. I'd be glad to provide additional assistance for this issue. I'd like to ask the following questions in order to assist you further:

Have you checked if you can receive emails when you log in your account to Outlook.com online using the web browser on your computer?

Have you already removed and re-setup your email account in Outlook 2010 app?

Hi Romel,

Thanks for your reply.

outlook.com webmail is working perfect.

emails from Android and iPhone both working perfect.

Only facing issue in receiving email in MSoutlook (pop service), (sending emails from MSoutlook is working).

yes, i tried to re-setup the settings, i tried in another laptop (facing same issue).

now this issue started for 2 more clients in our organisation...

Experts please assist, need the solution urgently..

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Thank you for providing us additional information. The problem could be with the incoming mail server settings.I'd like to ask further questions:

May I verify your email domain? Are you using a company email account?
Have you tried sending a test email to your own email account?
Does the issue happen on a specific sender only?

Thank you in advance!

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Hi Romel,

Yes, this is company's email account... 

we have 14 email accounts, only 3 facing this issue.

yes, i tried sending self email... sent successfully.

received email on Android & iPhone mobile and on webmail, but didn't receive on MSoffice (i guess pop sync is having issue).

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Last updated May 10, 2024 Views 4,647 Applies to: