Can't Send Emails from PC or Phone App?

Are you using a VPN?

Looks like the IP you are trying to send from belongs to MetroNet
https://search.arin.net/rdap/?query=69.174.160.30

the CSI IP error code in reference is to a global reputation system:
https://csi.cloudmark.com/en/reset/#:~:text=Cloudmark%20Sender%20Intelligence%E2%84%A2%20(CSI,%2C%20bad%2C%20and%20suspect%20senders.&text=This%20portal%20will%20only%20accept,published%20by%20Cloudmark%20Sender%20Intelligence.

You will need a representative of MetroNet to open a case with CloudMark as they deem their IP to globally not be safe for sending emails. 

I'm sorry but you are not correct. Metronet said they have nothing to do with CloudMark. Comcast goes through them and you guys would have to fix it.

I've called 4 times, after hours of waiting, been diconnected 4 times while being transferred to someone that was suppose to help. I'm at the end of my rope.  Comcast has got to be the most incompetent company I've ever dealt with.  Someone, somewhere has got to be able to help.  I'm begging.

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@OverBurn wrote:

I'm sorry but you are not correct. Metronet said they have nothing to do with CloudMark. Comcast goes through them and you guys would have to fix it.

 

I've called 4 times, after hours of waiting, been diconnected 4 times while being transferred to someone that was suppose to help. I'm at the end of my rope.  Comcast has got to be the most incompetent company I've ever dealt with.  Someone, somewhere has got to be able to help.  I'm begging.

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1. Are you a current Metronet customer or a current Comcast customer?
2. Are you having any problems sending email from webmail or just from Thunderbird?
3. What are your Thunderbird server settings for incoming and outgoing mail?

I am a current MetroNet customer.  Cancelled my comcast a year ago.  Was told I could keep using my comcast email indefinitely.   Was planning on possibly coming back to Comcast later, at least leaving the option open.

Can not send email from Thunderbird or the Xfinity Phone App.  Do not use online comcast web mail.

Thunderbird settings

POP Mail Server - mail.comcast.net -  port 995 - SSL/TLS - Normal Password

Out Going - smtp.comcast.net - port 465 -  SSL/TLS - Normal Password

All the same exact settings that have worked for years. 

Xfinity app doesn't send either.   

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@ComcastCSAEmail wrote:

Looks like the IP you are trying to send from belongs to MetroNet
https://search.arin.net/rdap/?query=69.174.160.30

the CSI IP error code in reference is to a global reputation system:
https://csi.cloudmark.com/en/reset/#:~:text=Cloudmark%20Sender%20Intelligence%E2%84%A2%20(CSI,%2C%20bad%2C%20and%20suspect%20senders.&text=This%20portal%20will%20only%20accept,published%20by%20Cloudmark%20Sender%20Intelligence.

You will need a representative of MetroNet to open a case with CloudMark as they deem their IP to globally not be safe for sending emails. 

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To be specific, MetroNet needs to fill out the form to appropriately advise CloudMark what the IP space is used for and whether or not they have resolved any possible abuse incidents originating from the IP address.

The short of it:
CloudMark: "This IP is not suitable for sending emails on the internet and have listed the IP on our global blacklist."

Comcast: "We trust CloudMark on this one."
MetroNet: "CloudMark, please remove our IP from your blacklist because it is a residentially assigned IP address and I assure you there is no abuse activity coming from it."

Unfortunately, we would be unable to make the request to unblock because we are not MetroNet and we would be unable to confirm if there was any abusive activity coming from the IP or not.