email - temporarily blacklisted IP address - try again later - again

@XfinityAmir I have powered everything down (exited Thunderbird, shutdown Windows 10 and powered down the PC, and disconnected power from the Startlink router), waited 30 minutes, and powered everything back up. The same public IP address was assigned to the Starlink router [Edited: Personal Information] and the same inability to send or receive e-mail.

I am also unable to read e-mail using my iPhone 12 using the built in mail application.

If I establish a VPN connection I get a different public IP address [Edited: Personal Information] then I am able to read email using an IMAP connection to comcast.net without making any other changes on both my Windows 10 PC using Thunderbird and my iPhone 12 using the built in mail application.

Any help you could give me would be greatly appreciated.

@ragtowne, if you bypass the Thunderbird client and try to access your mail using our website https://comca.st/3wA1rKr are you able to send/receive mail there? In your MAC mail on the IPhone12 have you tried removing the account and then adding it back to the mail client? 

Yes accessing https://comca.st/3wA1rKr using the Firefox browser on Windows 10 PC works.

So I did as you suggested on my iPhone 12:

- removed [Edited: "Personal Information"]

- attempted to add it back in with the description " [Edited: "Personal Information"]".

It failed --- with the following error message:

[Edited: "Personal Information"] is currently unavailable.

I tried it twice and it gave the same error message back.

I started up a VPN session (using PureVPN) on my iPhone 12 and with the exact same settings it worked.

The same is true for my Windows 10 system - if I start up a VPN session (using PureVPN) Thunderbird is able to access e-mail via the IMAP protocol.

@ragtowne thank you for being so detailed on your response. I'd like to look into this a bit on my end of things. For further assistance could you please send me a private message with your full name and street address? 

To send a "Peer to peer" ("Private") message:
Click "Sign In" if necessary
• Click the "Peer to peer chat" icon
• Click the "New message" (pencil and paper) icon
• Type "Xfinity Support" in the "To:" line and select "Xfinity Support" from the drop-down list which appears. The "Xfinity Support" graphic replaces the "To:" line
• Type your message in the text area near the bottom of the window
• Press Enter to send it

I send a message as you requested.