Problem syncing email between Iphones/ipad

Question

We recently added a (shared) comcast email address in hopes of replacing our AOL email account.  Now we have a few problems:1. How do we sync COMCAST email between our desktop, two iphones (4S and 5) and ipad so that deleting/reading/moving from one phone impacts everything?  Per Apple we now have to delete all emails from Xf by logging in (so via our home computer), but deleting/reading from the phones has no effect on the other phone/ipad. I tried the url in "inflightgolf"s question & it's inactive.2. We can't send COMCAST emails from the ipad.3. Also our shared calendar events (phones, ipad) sync more slowly (sometimes not at all) than they did before we added the COMCAST email account, tho can't see how that would be impacted. 

Answer 1

Thanks for trying, but I didn't really understand the terminology in your explanation. Tried calling COMCAST Tech Support but they didn't seem to understand the problem + their phone lines were full of static.  We went back to the Apple Store and:1. The Apple tech was looked at our iPAD & caught a typo I'd made when entering our new email address - so now we can send emails from the ipad. 2. He also explained that unlike AOL, because of the way COMCAST/Xfinity's server works, we'll have to delete anything from our Comcast email account individually on each device (something about IMAP vs POP).  I'm simplifying things by not reading email on my phone anymore, and just deleting everything from my phone every few days.  At least I could now confirm to a friend with Comcast email that she can delete all the emails from her phone without worrying that she might inadvertently lose something she wanted on her computer.  Wish we'd never shifted to Comcast email, of course, but it's a bit late now.3. Whatever the problem with the calendar was, no clue, but we're just being careful about scheduling things & I'm sure it'll work out. Again, thanks for trying.