Based on what I can see from Arvixe's Knowledge Base, there are two options. If you want to use SSL, you will need to use mail.webeasyserve.com
port 465
. If you don't want to use SSL, then use mail.abcd.com
port 26
.
However, this knowledge base article is two years old, so it is possible the information is out of date. Hopefully it will point you in the right direction, even if it is no longer correct.