In the past Cloze users were not able to connect with their Comcast email. Comcast email relies on the older email POP protocol vs. the more modern IMAP protocol.
Comcast has recently added support for IMAP.
More information about connecting your Comcast email to other services like Cloze can be found here.
To connect your Comcast email account:
1.) Tap on More (...) in the lower right of your screen on iPhone/iPad and lower left on cloze.com.
Cloze on iOS
Cloze on the web
2.) Tap on Settings
3.) Scroll down to Mail Accounts and Tap/Click the Add button
4.) Tap/Click the Add button next to Other
5.) Enter your email and password and then select Comcast in the Email Service Dropdown menu. Tap the orange connect button when you are ready.