Cannot send email from Kindle Fire 10

Since about 10 days ago, my Kindle Fire gets an error message when sending email.  The error on the Kindle just states: "Connection problem (Comcast)", and the email fails to go out.  I am able to receive emails fine.

I saw an article that discussed a setting on xfinity.com to allow access to third party email programs, and turned it ON, but this did not resolve my issue - outgoing emails still fail.

Settings on the Kindle:

Outgoing:

SMTP Server: smtp.comcast.net

 Use same credentials for incoming and outgoing servers.

Use secure connection (SSL)

Port: 465

INCOMING:

POP3 Server

mail.comcast,net

Username: myusername

Password:  mypassword

Use secure connection

Port: 995

Thanks!