I'm having trouble sending and receiving Email on my MacBook Pr0,Apple computer.but i can receive and send on my apple ipad. should i use the same password on both devices.
Also is comcast.com and xfinity.com, the same the same on Email accounts?
Yes, Xfinity and Comcast are the same company. The password is not for a device, it's for the Comcast account. It would be the same no matter which computer/device you use to access it. On the Macbook, are you using only a browser and the webmail interface, or Mac Mail or something else? Exactly what happens when you try to send? Have you tried sending yourself an email from some other, non-Comcast, email account you have like Yahoo or Gmail? If so, does it arrive OK?