Temporarily blacklisted IP Address

I cannot access my email via Outlook. When trying to receive my email I get the following error:

Receiving' reported error (0x800CCC92) : 'Your email server rejected your login. Verify your user name and password for this account in Account Settings. The server responded: -ERR [AUTH] Temporarily blacklisted IP Address - try again later'

This happened a while ago and did clear up after a few days. But here it is again. After a week of "trying again" I am still getting the same error. I've been a customer for 10 years, why would my IP address get blacklisted? And how do I prevent it from happening again, as it has happened twice in the last month or so.

Thanks in advance.

Responses

CCMorgan

Gold Problem Solver

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3.3K Messages

3 years ago

Hi, caschwendiman. This certainly sounds frustrating! We're happy to take a closer look to see what we can do to help out. Email authorization errors such as this one typically mean that the password is incorrect for this email account in Outlook. It sounds like it might be a password mismatch going on here. Have you reset your Comcast email's password recently?

caschwendiman

Regular Visitor

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6 Messages

@XfinityMorgan No, this is not a user ID or password problem. I have not changed the password recently. The fact that I can login here to comment means my password is correct.

As I said in my original post, this problem occurred previously and then cleared up on its own a few days later. This latest case finally cleared up on me this past Sunday. I am now accessing my email from Outlook today.

The error message said my IP was temporarily blacklisted. There are a number of other threads about the same topic. As this is not a user ID or password problem, can you tell me why you would blacklist IP addresses? I can not afford to have this keep happening. If I'm doing something to cause it, tell me what it is so I can stop. I've been with comcast for 10 years and overall I have been happy with the service up until now. But if this problem keeps occurring, I guess I'll be looking for another internet service provider.

(edited)

3 years ago

CCMorgan

Gold Problem Solver

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3.3K Messages

Do you know if you're able to log in to the native https://comca.st/3lCkuiC website to retrieve email when you're experiencing this problem? Have you tried/confirmed? Which tool/source are you using to verify your IP has been blacklisted, when it's occurring?

I no longer work for Comcast

3 years ago

caschwendiman

Regular Visitor

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6 Messages

I'm not sure what the https://comca.st/3lCkuiC website is. I can log into my Xfinity account and access my email that way. I am getting the "Temporarily blacklisted IP Address - try again later" via Outlook when it tries to pull in my emails. The message says the error was returned by the server.

This morning the problem returned. Since there are a LOT of threads here on this problem I started reading through more of them. There was a suggestion that using VPN could be associated with the problem. So I turned off VPN and now am able to retrieve my emails.

So I guess the solution is to turn off VPN. I'm not happy with that. Is there anything I can look at to provide more information to help figure out why VPN sometimes causes this problem>

3 years ago

user_8cd05f

Visitor

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1 Message

I have been fighting this same problem on my Comcast email account. It started when we moved to a new location that does not have comcast internet. I dont have a vpn and we have Data Stream internet service. It is intermittent so I do receive emails every 5 to 6 days when it clears up.

Its like somebody is flipping a switch on at Comcast to cause the problem. I can go to a different location and use the internet to connect to comcast with no problem. Yet at our new location, I continue to get the error message.

If anybody knows whats causing this, please forward instructions....thanks, Fixpack.

3 years ago

XfinityKei

Official Employee

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1.2K Messages

Hi @user_8cd05f I'm sorry to hear about the issue you're having with receiving your emails. I have a wonderful link with our Frequently asked questions for emails emails.

I am happy to help resolve this for you. A few questions for you.

How are you accessing your emails? Are you using a third party client or are you using our web portal at Check email? Are you able to receive up to date emails using the portal?

If you use a mobile device are you able to toggle between your Wi-Fi connection and your mobile data to see newer messages?

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer. tick

3 years ago

BruceW

Gold Problem Solver

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26.1K Messages

3 years ago

... Is there anything I can look at to provide more information to help figure out why VPN sometimes causes this problem>

VPN's have lots of legitimate uses, but they are also a magnet for spammers and scammers whose activities "poison" the VPN's IPs. Sending email using a VPN is likely to always be iffy. See https://forums.xfinity.com/conversations/email/some-email-not-being-sentintended-recipient-does-not-see-the-email/611d7226bfcc4a43b941e659?commentId=61b77bf7f06968168603713c for more details.

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

clark330

Visitor

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2 Messages

2 years ago

I had the same problem ( temporarily blacklisted IP address) and I had the Norton VPN activated. As soon as I deactivated it.....problem solved.

mbspectrum

Visitor

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2 Messages

2 years ago

I repeatedly run into the problem of temporarily blacklisted IP address when using Thunderbird via a Spectrum modem and router.

Everything works well for a few days or weeks then all of a sudden IP address is blacklisted.

Sometimes it fixes itself and sometimes I spend hours and hours with Xfinity help and maybe they help and maybe the problem just goes away for awhile.

I've tried all the standard fixes: rebooting, updating, allowing Thunderbird access through Windows Firewall, deleting all other firewalls, making sure there is no VPN, checking that I can access email via web browsers (generally I can), using postmaster.xfinity.com to request unblocking, etc. None of these seem to work consistently. Can anyone help me?

Again

Expert

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31K Messages

@mbspectrum

Are you using a Spectrum rented modem? If so, why? Shouldn't you have returned that modem? Why aren't you using a Comcast/Xfinity rented modem, or bought one for yourself?

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Please mark an Accepted Answer! tick

2 years ago

mbspectrum

Visitor

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2 Messages

2 years ago

Temporary IP Blacklist problem solved. The issue was one on the computers on the home network had an old Xfinity password in Thunderbird. The repeated failed login attempts eventually creates a situation for a temporary IP blacklist.

ienstein

Visitor

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1 Message

2 years ago

I have also experieced this issue with thunderbird+comcast, but it's not the only culprit. As well as the VPN usage that others have mentioned, I also found that using the Cloudflare warp service also causes the same issue with comcast email, while all other email continues to work fine. I like that comcast seems to be aggressive with their security filtering, but sometimes it results in problems like these, so I hope comcast guy is listening and incorporates these use cases into their security exceptions in a timely fashion. (Ha!).

debkit7

Frequent Visitor

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11 Messages

2 years ago

Thank u so very much ienstein, for entering necessary detailed information. I wouldn't hold my breath on Comcast, whom only proves to me for years (only cabel available, or I'd drop them in a second!!!) that they only know how to increase costs, and provide the worst customer service provided by all orgs. I work with. They lie constantly when u finally get them on the phone w/false promises to fix their problems, and also mess w/software changes to fake errors w/older equipment in an attempt to force us into the xfinity system with errors that are caused by them to upsell a higher costs program and equipment required, much worse than the original in regards to privacy issues. They are proud of their speak to remote, and unconcerned w/e-mail services, forcing u into the imap properties, instead of pop3 version of e-mail delivery which is much more private. I have notified them more than 7 times this year, they even scheduled an appt to my home, when the tech's get here it's not to address any internet service problems, and he claims they cannot fix those problems on a site visit. It's truely an exasperating experiences w/them. I am extremely tenancious, and detail oriented, but try getting a tech that truely wants to get to the bottom of a repeating problem.

Again

Expert

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31K Messages

2 years ago

@debkit7

POP3 is still available to users. If that's what feels more comfortable for you to use, then use it! Both IMAP and POP3 are available and can be used with any third party email client. It's really whatever a customer prefers.

debkit7

Frequent Visitor

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11 Messages

@Again I did force them to sign me back up under pop3, Got a tech rep, that only believes in imap, and insisted that my password under outlook was the same as comcast's/xfinity's password, which was not true, the account had been set up long before, imap was even available and xfinity changed all the incoming and outgoing server # protocols. My outlook will not work at all on pop3, constantly blacklisted shuts off use to outlook, so THEY changed my account to IMAP even though their support items listed for this problem when i last viewed says u can use pop3, its not true, it does not work, because xfinity keeps blacklisting you, even when your forced to turn off your Norton VPN. I did not change my account to imap, they did. Ive spent hours on the phone w/an older gentleman, have his name written down on my manual call logs, but to no avail, cannot make the problem go away. They have no one technically inclined to support my problem and I hate imap showing all my e-mails on their site. Xfinity/Comcast has created this problem, and are unwilling to fix it. We should have the right to use a vpn to keep our info thru e-mailing even more secure, but not w/xfinity. Ive paid Norton to fix the blacklisting, and am done paying them $20.00 a month to solve a problem w/control of my equipment, to fix what using comcast reoccurs. Ive reached out to Outlooks, forums to see others w/similar specs/details w/same problem w/no answers. Previous to the many changes xfinity made to e-mail service, my e-mails on their site would be deleted once received to my laptop. under Imap i cannot delete it on their site as it deletes it on my laptop outlook account. Had to change my password under outlook to comcasts password, I do not find that secure, and in fact a direct immoral privacy issue. Thank you so very much for caring to even address my issue, but has been tried more than 3 times this year alone. I would gladly pay for a tech support who could resolve the issue for me.

2 years ago

XfinityArmand

Official Employee

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1.9K Messages

Hi there @debkit7! So worry to learn that you are having issues with your email and access. We definitely want to make sure this gets taken care of for you. Have you reached out to our Customer Security Assurance Team? Our Customer Security Assurance (CSA) team makes sure you have a safe online experience. You can reach out to them directly here https://comca.st/3E3unjW. There you can submit a request, and they will help get to the bottom of this for you.

2 years ago

dbrew2001

Regular Visitor

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5 Messages

2 years ago

Today I started getting" Temporarily blacklisted IP Address" message for my Comcast email addresses. I have been using Mac mail since 2011 on my computer and phone and never had this issue. I can't access email until change the password, I recieve the confirmation emails that it has been updated. I then change the Mac mail settings with the new password and it rejects it and the whole cycle starts all over again. As a note, my Gmail email works fine through Mac Mail it is only Comcast email address with this problem.

At first it was only one of the 4 Comcast emails now it is blocking the rest of them. When I view the Account on connect.xfinity.com I can only access one email address (but still can't access it with mac mail). It now shows I have to reset the other 3 passwords "The entered credential or authentication information does not work or are no longer accepted by provider. Please change them."

Another odditty is one of my email address does not even show listed under the Account.

What is going on?? This has stop and get fixed once for webmail, mac mail on the computer and phone. Please help.

debkit7

Frequent Visitor

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11 Messages

@dbrew2001 , I am curious based on all my problems w/comcast/xfinity, are they forcing u to use your same password that u use to enter the comcast/xfinity site, as this was the only way to get my 3rd party e-mail into outlook, which has me really upset, but just wanted to know if this is what they are expecting u to do to be able to access your e-mail w/o being blacklisted?

2 years ago

CCEdgardo

Problem Solver

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513 Messages

Hi there, @dbrew2001. Thank you for commenting on this post. Are you using the settings provided in this link https://comca.st/3RxO8mu to set up the email?

I no longer work for Comcast.

2 years ago

XfinityDaveL

Official Employee

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193 Messages

@dbrew2001

Please, the next time the problem occurs, go to http://whatismyip.com (so we're sure of what your IP is), and Direct Message me your IP.

To send a "Direct" message:

Click "Sign In" if necessary

• Click the "Peer to peer chat" icon near the top of the page• Type "XfinityDaveL" in the "To:" line and select "XfinityDaveL"" from the drop-down list which appears.
• Type your message in the text area near the bottom of the window
• Press Enter to send it

(edited)

2 years ago

user_d082d7

Visitor

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2 Messages

Some of the people answering questions do not seem to know the difference between e-mail client options, so their answers are likely irrelevant. I had the issue. It was intermittent. It took me a while to realize that Comcast was blacklisting my VPN ip address. I turned off my VPN and corrected the issue. Comcast should NOT be blocking my VPN, but I will put that on the "list" of thinks comcast messes up. :-) hope this helps someone

2 years ago

user_e9edf4

Visitor

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1 Message

2 years ago

I am having the same issue and was just trying to figure out how to message Dave via peer chat and can not seem to find it.

Email

caschwendiman

Temporarily blacklisted IP Address

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Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

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ienstein

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