Re: imap.comcast.net not responding

Try using webmail to log in to your xfinity email account. Sometimes the imap servers go down. That has been happening a lot. The phone support people are not been made aware of these outs or clueless. Take your pick.  Did you try on other systems? You can also try changing your imap settimgs from "imap.comcast.net" to "imap.ge.xfinity.com" without the quotes.  Try webmail first at "comcast.net" click on the mail icon on top of tha webpage.

I tried that. Still cannot receive emails

Same here. I need it and depend on it,I cannot view bill notifications for utilities, etc. I can use Gmail, but that is of no help. No one knows that account. I use it for on-line purchases so as to not get on mailing lists. I also had suddenly after years been receiving a ton of spam. I already read up on forums. The same has happened to other long time Comcast Xfinity customers, so that too is Xfinity, not me

Doesn't work. Cannot receive emails on any devices for days. 

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@Latoque wrote:

First thing to check-------is your Safe List enabled?  To see, on the Inbox page click on the gear icon in the upper right corner, then on Settings>>>>>Advanced settings.  If it's on disable it.  If it's on, nothing will get to your Inbox except contacts you put on that list.

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lam2008, thanks for taking the time to discuss your imap concerns and for updating us along the way. 

I assume you have confirmed your imap settings via https://www.xfinity.com/support/articles/email-client-programs-with-xfinity-email ? 

After one tech left me with no phone, no internet & no television in attempting to fix this email issue who promised to call my cell phone @ 5:00 PM, he never did.  I called, was on hold for 56 minutes. A new tech was sent the following afternoon. . I am not comfortable using a hotspot to begin with, but Comcast/Xfinity email holds no valid certificate, meaning anyone can (and has)  via camera, which I now tape over on my iPad, which in fact Mark Zuckerberg and "white hat hacker" advise. see everything. I know because this hacker had my passwords. I would strongly caution customers on this) My email settings are the same. I don't know what he did to fix everything. I usually know more than they do. I believe, in further research that some IPs are blacklisted. I found quite a few connected with Comcast are. Had the first tech knocked out everything in my house, I would have possibly attempted this, which I suspect he did. I was told on the phone that the servers were down. That was a bold faced lie. I asked if dedicated servers were used for email, as that was my only issue. He did not know what that meant, zapped everything off and that was that. I really ought to get a credit, but not calling & sitting on hold for an hour trying to explain that I had not thing for over 24 hours due to a tech, had spent 3 hours before the final call. I do find another setting for Xfinity Business. I tend to think it was blacklisting due to no certificate. According to both Xfinity & Apple my settings were correct, and I did try other ports. Tech sites (which I won't say which) tested the settings to fail due to IPs being blacklisted due to no valid certificate. As I see this issue has been ongoing for quite some time with different individuals in completely different areas of the country, that sounds plausible. Removing that ought to be able to be checked by a tech over the phone as your average customer would have no idea what this is. 

Iam2008 you provided a lot of info here so I have a few questions: Do you believe you were hacked and that is the reason for the email issues? If you believe the IP address was blacklisted and that you were hacked, I recommend you reach out to our customer security assurance team as they can resolve the IP issue and then fortify your account security. They can be reached here: 1-888-565-4329.

 I don't know what he did to fix everything. I usually know more than they do.

I'm glad to hear that the tech was able to resolve the issues here. Post again if you need further assistance. 

The hacking happened several months ago. It was the largest security breach in the U.S. to date. So much so that a website was set up. My passwords were used on 72 sites. I did change my Comcast/Xfinity password. IT guys had to do calls on many businesses. As far as email, I don't ever click on links. I received an email from my Comcast email to my Comcast email. That, of course got me to open it. My passwords were noted to quite a few different sites. I know how to see the source, but it was already known. This made national news & most internet providers gave the website to check if they had been compromised. In this case, I will provide a link that Xfinity ought to send to every customer if they haven't. I still think the issue with my email was IP numbers being blacklisted. I found very many associated with Comcast/Xfinity before the 1st tech knocked out my television, telephone & internet altogether. Inputting my correct settings which are still the same, but now functional, were not working per tech sites due to having no certificates what so ever. If you look in your email settings, you will see that line is blank. Initially, I thought the certificate needed to be renewed, updated or added to trusted certificates if it was seen as an untrusted certificate. Here is the link which every customer needs to check and may need to be added to another forum if Comcast/Xfinity already did not do so. 763 million email addresses were compromised. Many records within the data also included additional personal attributes such as names, phone numbers, IP addresses, dates of birth and genders.  https://haveibeenpwned.com

And STILL not receiving all Xfinirty mail. This includes bills and codes needed after clearing history to access a website to see a bill I never received in the first place. I then have to telephone as I am locked out of account (credit card, etc.) due to Xfinity blacking emails altogether. Not in spam, unwanted, nowhere. 

As far as emails from Xfinity to Gmail, it is the inclusion of links. Gmail,receives from any other sender. It will not receive from Xfinity and will show in Xfinity as a permanent Daemon failure 

I’ve tried the fixes to no avail...no email on any apple devices through regular mail icon.  Yet, at xfinity.com I can get my email. Nothing about my iPad or iPhones was changed in any way.  Anyone from xfinity that can give me a fix method.  Thanks

@CCKenF 

i am having the same issue. multiple calls to comcast, just has me delete and reenter email account verifing account settings which are the same as they were 3 days ago when email worked fine. What i find interesting is that i am only getting this error when on my home wifi. Both my comcast emails stop refreshing email on my iphone mail app and say error imap.comcast.net not responding. then i switch off wifi and go to cellular data and refresh mail and they come in. switch wifi back on and refresh and error comes back. i have reset router, modem, checked all settings, again nothing different from 3 days ago when it was working. 

They decided to use port 587 for some unspecified reason so ALL of our phones no longer send email till you change to 587