• Contact Us
  • Select a Location
    Close Location Selection

    Current Location:

    Let us know the location you'd like to browse.

    Select a Location

Email Server Settings

Most third-party email clients or applications available on computers and other devices can be configured to send and receive Cox Business Email or Cox Email. To help you get the most out of your email, Cox provides settings and server names.

Learn more about the email topics below, or go to the email server settings for your Cox Business Email or Cox Email now.

IMAP Settings

IMAP servers allow users to manage emails via email clients, such as Outlook, Thunderbird, or others. IMAP offers the following features that POP does not.

  • With support for simultaneous multiple access, new email is available and accessible from any client device at any time.
  • Partial fetch allows only the sender and header information to be downloaded which leaves more storage on the device.
  • Two-way communication between client devices and the email server increases the stability of the server.
  • Messages can be downloaded to the client device, if needed.
  • Actions to a message such as read or replied to will be seen on any client device accessing the same mailbox.
  • The server can be searched for specific messages based on different criteria which allows the user to download only the messages they want.

POP or POP3 Settings

POP or POP3 servers allow users to manage emails via email clients, but are most commonly used when managing email from a single device.

  • If you are using POP settings on multiple devices, then you may experience email sync issues. To help resolve email sync issues, you can set the email client to Leave Messages on Server.
  • When using the setting Leave Messages on Server, Cox recommends that you regularly check your mailbox size to ensure you do not reach your mailbox storage limit. Reaching your mailbox storage limit means your inbox cannot accept any new email until you take action to delete email from your mailbox.

Switching to IMAP

To switch from using POP server settings to IMAP in your email clients, Cox recommends that you back up any important email that you want to save before you complete the following steps.

  1. In your email client, set up a new IMAP email account using the same email address associated with the POP settings.
  2. Delete or disable the POP email account.

If your email doesn't appear in your new IMAP-configured email account, then it may be due to one of the following reasons.

  • The setting Leave Messages on Server is not enabled in the POP-configured email account.
  • There is a configuration issue with the IMAP or POP server settings.
  • Settings are applied to incoming email, such as a filter or mail forwarding.
  • Deliberate or accidental human action, or a compromised account.

Background Information

The following acronyms are used to describe common email server settings.

IMAPThe Internet Message Access Protocol (IMAP) is an incoming server. IMAP allows you to view and synchronize incoming messages across multiple devices from your email client.
POP or POP3The Post Office Protocol (POP) is an incoming server. POP3 is POP version 3. You will either see POP or POP3 when configuring your email account(s). POP enables you to download messages from the email host location to an email client.
SMTPThe Simple Mail Transfer Protocol (SMTP) is the outgoing server. It sends messages from your email client to the host.
SSLSSL stands for Security Sockets Layer. It encrypts your information from would-be thieves as it is transmitted from one location to another, such as with email. Choosing to encrypt by checking the SSL box provides added security to your transmissions.
TLSTLS is Transport Layer Security. It encrypts your information from would-be thieves as it is transmitted from one location to another, such as with email. Choosing to encrypt by checking the TLS box provides added security to your transmissions.
Do you have a Cox Business Email account or a residential Cox Email account? Click one of the following links to see the email server settings that you can use in your email client.
New MyAccount

Cox Business MyAccount Updates

With the new and improved MyAccount portal from Cox Business, you’re in control. Included with your Cox Business services, it’s all right at your fingertips anytime, anywhere. 


  • Perform a health check on your services and reset your equipment
  • Easily configure key features and settings like voicemail and call forwarding
  • View your balance and schedule payments

Search Cox Business Support

Didn't Find What You Were Looking For? Search Here.