First off, I can't guarrantee this will fix your particular issue. It fixed mine. READ ADDENDUM below, first, then the rest of this. Apparently, ICS reconfigures numerous programs and settings. Comcast Email is one of them. The settings have SSL as default in both, incoming and outgoing. Comcast, afaik, doesn't use or require SSL (I may have been wrong here, as can be seen below but you may need to change ports.) You need to change SSL to "none" in both, incoming and outgoing settings. That's it. Nothing else need be done. Close it, relaunch email app, let it connect or manually connect. The "no connection" error should be gone and your email should come in and go out. Now, how to to do it:
Click on the "Apps" circle button, all apps, My Accounts (or Accounts and Sync if you don't have My Accounts), Email & Calendars, --> choose your comcast account and go to Account settings, -->choose Comcast (not General), scroll down to "Server Settings". Here you'll find your incoming and outgoing settings. Under "security type" choose "none" and do that for both, incoming and outgoing. Incoming Port: 110; Outgoing Port: 587. Click done, for each server, incoming, then outgoing. It will validate the server each time. When finished, click done, and let it connect to email and download it.
I hope this helps all who have been having Comcast Email issues after ICS update. Good luck!
***ADDENDUM***: After checking a few things, and testing new settings, I found these settings to work as well. Especially, if you need the security of incoming/outgoing email via encryption method. These setting are working on my phone: Incoming: Port 995; Security type SSL/TLS (the top one! I don't know if the second one will work but I suppose you could try it out). Outgoing: Port 587; Securtiy Type SSL/TLS (same as Incoming, whichever one you end up using). This setting should work for you, as they are for me. If you find they don't, or they stop working, you can always revert to the above settings I initially provided. Hopefully, I'm not confusing anyone. 
Jwm4712, glad that helped you and fixed your comcast email problem! 
I don't have wi-fi, but hope to get a router one of these days. My cousin across the street has wi-fi and I can almost pick it up here but keep it turned off since the connection is too weak and always dropping, unless I'm in her house or around it. Mostly, I'm in solid 3G. When I have 4G, it's only 1 or two bars. Oh, and thanks for the invite!
I am dense when it comes to many things Google and smartphone. I freely admit it. I have no idea what it means to have an account using calendar. I use calendar but for typical calendar like things. But no email account specifically linked to it. As I have no need of a corporate email, or Exchange, I don't use it. My gmail is only for gmail. Nothing else linked to it like calendar. All that said, I wish you luck and hope you find answers you're looking for. If you do, please share them here in the forum so others who have similar or same issue can find their phone's inner peace.
It appears that there was a corrupted ICS configuration or software modification by the ADDons affecting the calendar function within GMail. Motorola had me OS reset/refresh my cellphone. I was worried that the OS reset would rollback to the previous 2.x Android, the Motorola tech swayed my fears by stating the only affect would be to force ICS to be loaded without addons. It took the better part of 30 minutes to do this, and once I had finished configuring the phone for Google access, the default calendar SYNC'd and test changes I had made were posted both on the phone from the Google calendar and on my google account from the cell phone calendar. I then installed the APPs in my Google Play list (there should be an APP for that 
. So far, the cell phone is syncing. Just watch, when Jelly Bean is released for the Droid...I'll probably have to go through this again. C'est la Vie
dollarbang wrote:
It appears that there was a corrupted ICS configuration or software modification by the ADDons affecting the calendar function within GMail. Motorola had me OS reset/refresh my cellphone. I was worried that the OS reset would rollback to the previous 2.x Android, the Motorola tech swayed my fears by stating the only affect would be to force ICS to be loaded without addons. It took the better part of 30 minutes to do this, and once I had finished configuring the phone for Google access, the default calendar SYNC'd and test changes I had made were posted both on the phone from the Google calendar and on my google account from the cell phone calendar. I then installed the APPs in my Google Play list (there should be an APP for that
That's why it is a good thing to try as the last step to going to Verizon to have the phone replaced. Issues can be resolved by doing the reset.
Glad it worked for you.
It worked for my husband's comcast account, thank you so much! He's only had the phone a week and was ready to give up and take it back.
