If you signup with Sophio to manage your webstores email, you will be using the Rackspace email service with Sophio as your 'reseller'. This means that we can help you diagnose problems.
For help setting up your email click here.
If you just want to know the various settings for POP, IMAP and SMTP see below.
Inbound Servers (receiving mail):
Insecure
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POP Server (Non-SSL) pop.emailsrvr.com 110
IMAP Server (Non-SSL) imap.emailsrvr.com 143
Secure
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POP Server (SSL) secure.emailsrvr.com 995
IMAP Server (SSL) secure.emailsrvr.com 993
Outbound Servers (sending mail):
SMTP Server (SSL) secure.emailsrvr.com 465
SMTP Server (Non-SSL) smtp.emailsrvr.com 25, 587, 8025, 2525
If you are changing your mail server settings at your registrar, you will need to create two MX records.
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Blank or @ 3600 MX mx1.emailsrvr.com 10
Blank or @ 3600 MX mx2.emailsrvr.com 20
Also create an SPF Record
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v=spf1 include:emailsrvr.com ~all
Lastly, you should have mailbox named 'postmaster' to be in compliance with web standards. This mailbox will receive lots of junk mail and will be the mailbox that anti spam lists will contact when your domain has a problem.