Godaddy — emails being not sent

After wasting too much time and still not get the answer, my issue is unresolved.

1) Not able to send emails via outgoing server host
2) Previously emails were getting sent with the same settings
3) Domain, DNS settings is with godaddy
4) Email accounts are also purchased from godaddy

Not satisfied at all with customer service provided and frustrated as the support member sticks to only answer everytime rather than troubleshooting or debugging.