Outlook 2013 stopped sending emails but continued to receive emails

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My MS Outlook 2013 (which is operating on Windows 10 Pro-Version 1903) abruptly stopped sending emails but continued to receive emails. The detailed error message associated with this unexpected and unfortunate stoppage was as follows:
Task-‘myid@frontiernet.net- Sending ‘reported error (0x800CCC6F): ‘Your outgoing (SMTP) 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:
554 5.7.1 <c-xx-xxx-xxx-xx.hsd1.md.comcast.net[xx-xxx-xxx-xx]>: Client host rejected: Access denied’
In the foregoing error message which initially appeared on February 22, 2020, details about my email address linked to frontiernet.net at Frontier.com and my IP address linked to Comcast as my Internet Service Provider have been hidden to protect my privacy.

In any event, the bottom line seems to be that the problem is a function of something amiss with Outlook 2013 (Office Version 15.0.5207.1000) because the technical support staff members at Frontier.com which is hosted by Yahoo and which facilitates access to the SMTP server spent several fruitless hours using multiple configurations inside my Outlook to try to link my Outlook to the SMTP server with no success.

Moreover, deleting my account under Outlook and attempting to “refresh” my account as if it were a new one did not help. After the deletion, Outlook stopped any attempt to link to POP3 or SMTP. Doing a quick repair of Office did not help. Resetting my modem did not help. Frontier technical support ultimately concluded that the problem probably rests with Outlook because they successfully linked my Windows Mail using IMAP to my account without any problems.

Now I am left with a non-functioning Outlook which holds many gigabytes of emails within many folders located in several PST files, and I am looking to the wisdom of this community to help me to restore Outlook to its full functionality.

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Have you tried setting Outlook to use IMAP?

cheers, Paul

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Paul T.,

I appreciated your question because I tried again to use IMAP rather than POP3 and discovered that the following combinations seemed to work:

imap.mail.yahoo.com using port 993 with SSL

smtp.mail.yahoo.com using port 465 with SSL

During this new configuring, I checked that my smtp server required authentication and used the same settings as my incoming server.

At this point, I have successfully sent an email and replied to two incoming emails; consequently, I think that I am on the right track. Although I now have an additional file which is labeled with an OST suffix and which contains my new Inbox, I can live with this duplication because my old inbox contains my previous messages while my new inbox contains all of the new messages.

Thank you for your prompt and helpful response.

David

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IMAP is a better protocol for mail connection, but it does keep copies of all your mail on the mail server. As long as you have sufficient space on the server you will be OK, but if not you should archive old mail to recover space on the server.

You should be able to import your old mail / PST into the new inbox, server space allowing.

cheers, Paul

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[Mr. Austin]

Assuming you’re not running over an Exchange server….

I’ve run POP 3 for decades using Outlook. Currently 2010 until it rides off into its last sunset. Whenever I’ve run into problems like this I’ve always found something simple but unexpected amiss with mail server handshake (authentication) protocols. Most of my personal methods involve trial, error and success. As would this. I wonder if you’ve missed trying checking or unchecking a mail server authentication protocol in Outlook’s UI. Maybe post us screenshots with your vital stuff obscured? Especially SSL, TLS and Auto configs? In 2010 those things are shown inside Outlook in its mail Account Settings. I imagine that 2013 will be similar if not the same.

I don’t think rebuilding your PST profile looks like this issue. But once you solve the sending problem you’d also want to make sure that Outlook is sending and receive to the correct Outlook PST file, and in 2010 that’s also done through its config windows. You need only one PST file unless and until you archive stuff because Outlook gets reaaaaallllly slooowww when its PST file sizes get big.

Human, who sports only naturally-occurring DNA ~ oneironaut ~ broadcaster

• This reply was modified 5 years, 3 months ago by Mr. Austin.
• This reply was modified 5 years, 3 months ago by Mr. Austin.

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Soul Rider (Michael Austin), I have decided to drop my use of POP3 and continue with IMAP on multiple devices because I think that IMAP is meeting my needs.  Meanwhile, I have no idea why POP3 stopped working for me and technical support at Frontier has not been able to solve the problem. I am now using my old PST files as archive/storage units having multiple folders; consequently, I don’t think that my speed will be degraded by an inflated inbox under IMAP. Thanks, David

1 user thanked author for this post.

Mr. Austin

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Not sure if this applies to your situation. I have worked in large corporations which had size limits on users’ mailboxes. When they were getting close to the size limit, they couldn’t send mail, but they could still receive mail. Once they hit the size limit, they couldn’t send or receive. These limitations were set by policy. If you are running POP3, then you definitely aren’t hitting any size limits with regard to your email provider; but I wonder if you might have some size limits set in Outlook?

Group "L" (Linux Mint)
with Windows 10 running in a remote session on my file server

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Paul T,  I routinely archive my incoming emails into substantively meaningful folders; consequently, I do not have a problem with storage on the server because I am now using my old PST files as storage units having multiple folders.

Thanks for cautionary note.

David

 

 

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MrJimPhelps, I have decided to switch to IMAP (which seems to be working smoothly on my desktop and my laptop) and to forego any further attempts to use POP3. I am sorry to say that members of the technical support group at Frontier (whose email is hosted by Yahoo) spent hours in trying to get my POP3 connection to work. However, after I received a note from a Microsoft community member who said “SMTP is IMAP; Comcast/Yahoo are by default IMAP”, I concluded that I should switch to IMAP to save further headaches.  Thanks, David

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As long as you don’t try to store too much email in your IMAP (i.e. online) folders, you will be fine with using IMAP. I use IMAP, and when my online mailbox is getting too close to the maximum size, I move a bunch of mail to the local (i.e. offline) folders. (In your case, “offline” means PST files.)

The one thing you need to do is to back up those PST files. I recently had to do a clean install of Linux on my computer. I didn’t have a backup of the local folders, and I forgot to make a copy of them before doing the clean install of Linux. As a result, I lost years of emails that were in those folders.

Group "L" (Linux Mint)
with Windows 10 running in a remote session on my file server

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