The information in this article applies to:

Email
POP3
IMAP
SMTP

SUMMARY:
This document contains the general information for accessing the Integral Hosting mail server for sending and receiving email.

DETAILS:
Integral Hosting provides all customers with access to send and receive internet email using their domain name. To do this you will need to configure the email client on your computer to use the servers following the conventions detailed here.

Mail Server Hostname Convention
We will use the domain name "customerdomain.com" for the example domain name. You should replace "customerdomain.com" with the domain name you have setup with your hosting account. By creating these default DNS records it eliminates the need for our customers to memorize a specific hostname off of the integralhosting.com domain name. 

Mail Servers (DotNetPanel)
POP3 Server Hostname: pop.customerdomain.com
SMTP Server Hostname: smtp.customerdomain.com
IMAP Server Hostname: imap.customerdomain.com 

Mail Servers (HELM)
POP3 Server Hostname: mail.customerdomain.com
SMTP Server Hostname: mail.customerdomain.com
IMAP Server Hostname: mail.customerdomain.com 

POP & Imap Login Name Convention
The login name for logging into your POP and IMAP accounts follow the convention of being the full email address, not just the user name. For example you create the POP account with the email address of " user@customerdomain.com" . The proper login name is "user@customerdomain.com" not "user" . You must use the full email address as the login name. 

Mailbox Quota Size (DotNetPanel)
This set set via the control panel when you create new accounts. 

Mailbox Quota Size (HELM)
All customer mailboxes are the same size by default, 20 MB.

Maximum Email Message Size
All messages incoming, and outgoing are limited to 15 MB, including the size of the attachment.
Note: Even though the server can send and receive email up to 15 MegaBytes in size, the size of an email you can receive is limited to available space in your mailbox.

SMTP Authentication (POP-Before-SMTP)
The Integral Hosting mail servers use a method commonly referred to as POP-Before-SMTP to authenticate access to send email through our SMTP server. This means that in order for a customer to send an email through the SMTP server they must first check their mail via POP/IMAP first. Most modern email clients do they by default, or offer special settings to follow this convention.
Note: Integral Hosting uses this to restrict non Integral Hosting customers from being able to send email, and abuse the smtp server. Without this spammers could access the SMTP server and spam from it.

MORE INFORMATION
Customers should access the mail servers using the hostname's detailed below, accessing them via the IP addresses they resolve to is highly unadvised. The hostname convention will not change, the IP addresses they point to however could change for many reasons. Using the hostnames removes the need to update your settings if the IP addresses were to ever change.