The Email Server Names settings are:

• Incoming Mail Server - pop.PrimaryDomain
• Outgoing Mail Server - smtp.PrimaryDomain
  
  where PrimaryDomain is your hosting account primary domain, set in DomainCentral
  Example:
  
• Incoming: pop.FlowersByLisa.info
• Ougoing: smtp.FlowersByLisa.info
  
  where FlowersByLisa.info is your primary domain

The ports are:

• POP: 110
• SMTP: 587