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Glossary & Web Mail Services

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Address Book

A database to store email addresses of individuals and groups that you correspond with, each labeled with an easy to remember nickname. You may have a personal address book within your email client and through your web-based mailbox.


An attachment is a file that is sent along with an email message. The file can be of any type (for example a spreadsheet, a document, an image, or an mp3).



BCC (blind carbon copy) sends a copy of an email message to an "undisclosed" recipient. Their email address does not appear in the message.

This is in contrast to To and CC recipients, whose addresses do appear in the respective header lines. Every recipient of the message can see all the To and CC recipients, but can not see the BCC recipients.


A Blacklist is used by some services to collect sources of spam. Email traffic then can be filtered against a blacklist to remove spam. Blacklists can be created using domain or IP lists. Blacklisting not only impacts spam mailings but all email traffic—even by legitimate users of the domain or IP will be blocked.


Client ID

This is your account number with When you create an email service for your domain, you will be given a Client ID (account number). This account number helps us to identify your account and is the unique ID to allow you to access our online control center to manage your email service. The Client ID starts with the letter "c" (e.g. c51866).

Control Center

The Control Center can be accessed by clicking on the Client Login link on the homepage or by going to

With your Client ID and password, you can use your online Control Center account to add/delete mailboxes, add/delete aliases, and customize the look and feel of your email service pages. You can also upgrade your email service or update your current contact/billing information through the Control Center.


A CNAME record is a domain alias, and points a host name to another host name. To offer (e.g., you need to verify with your Web host that they can create and maintain a CNAME setting.



DNS (Domain Name System) is a system that translates a domain name from letters ( into a numerical IP address. Each time you register a domain name you must specify your DNS (Domain Name Server) information. If you already own a domain, there it is no need to transfer your DNS to If you register a new domain through, the DNS for this domain will be hosted by for email purposes only.

DNS Host

When you register a new domain, the DNS information for your domain is typically hosted by your registrar, your Web host, or your ISP. In regards to using, the requirement to allow us to host an email service for your domain is that you can work with your DNS host to make a simple update to the MX Record in your DNS file. For a domain that you own, has no access to update or change the setting within your DNS file.

If you register a new domain through, the DNS for this domain will be hosted by for email purposes only.


The unique name that identifies an Internet site. You'll find it to the right of the @ sign in an email address. The domain name of is Domain names are issued by the National Science Foundation (NSF), and come with different extensions based on whether the domain belongs to a commercial enterprise (.com), an educational establishment (.edu), a government body (.gov), the military (.mil), a network (.net), or a nonprofit organization (.org).

To allow to host an email service, you must own your domain or register a new domain through


Email Client

A program used to read and send email messages. As opposed to the email server, which transports mail. Typical email clients are Outlook, Outlook Express, Netscape Mail, or Eudora.

Email Header

The first part of an email message containing controlling and meta-data such as the Subject, origin and destination email addresses, the path an email takes, or its priority.



Internet Messaging Access Protocol. A protocol that defines an email server and a way to retrieve mail from it. IMAP is a more recent and more advanced standard for mail storage than POP. It allows for messages to be kept in multiple folders, supports folder sharing, and online mail handling where email message need not be stored on the user's computer.


Internet Service Provider. A company that offers users access the Internet. To access an email account with, users will need to have access to the Internet through an ISP or through a private Internet connection (work, Internet cafe, etc).



Lightweight Directory Access Protocol. A protocol for accessing directory information. LDAP is used by browsers and email clients to look up email addresses.

LDAP is a simple form of DAP, the Directory Access Protocol, which provides access to X.500 directory services. Because DAP is complex and difficult to implement, it has not gained widespread acceptance. LDAP does not provide all the functionality of DAP, but is easier and less expensive to implement.



Multipurpose Internet Mail Extensions. A method to send content other than ASCII text via email (file attachments). Arbitrary data is encoded as ASCII text for MIME. MIME increases the file size by 50-80%. Currently, most email clients support MIME and can send and receive files of arbitrary type.

MX Record

Mail exchange record, an entry in a domain name database that identifies the mail server that is responsible for handling emails for that domain name.

When more than one MX record is entered for any single domain name that is using more than one mail server, the MX record can be prioritized with a preference number that indicates the order in which the mail servers should be used.

The only requirement to allow us to host your email service for is that the MX record for must be pointed to our servers: IN MX 0


Open Relay

Early in the Internet's history, everybody was allowed to use everybody else's SMTP server to send email messages. The server would take the email message and forward it to the intended recipient.

Spammers exploited that trust and sent unsolicited messages through somebody else's mail server, thereby masking their real identity to the recipient. This is why most mail servers will not accept messages for relaying today. Servers that will accept such messages are known as open relays.



Post Office Protocol. A protocol that defines an email server and a way to retrieve mail from it. Incoming messages are stored at a POP server until the user logs in and downloads the messages to their computer. The current version is POP3.

While SMTP is used to transfer email messages from server to server, POP is used to collect mail with an email client from a server.



Simple Mail Transfer Protocol. The protocol used for email on the Internet. It defines a message format and a procedure to route messages through the Internet from source to destination via email servers.


UBE (unsolicited bulk email), UCE (unsolicited bulk email), unsolicited commercial email. Spam is unsolicited email. Not all unsolicited email is spam, however. Most spam is sent in bulk to a large number of email addresses and advertises some product or—far less often—political viewpoint.

Spam is an email message that you did not ask for and do not want from somebody you do not know, who wants to sell you something.


Web-Based Email

An email account that is accessed through a Web browser. The interface is implemented as a website that provides access to the various functions like reading, sending or organizing messages. Emails are typically not downloaded to the user's computer but stored on the web-based email service provider's servers. Popular examples of web-based email services include

Web Mail Address

Also known as the Web Mail URL. All email services offered by offer mailboxes with access via the Web. That is, all users can access their mailboxes using popular Internet browsers such as Internet Explorer and Netscape to send/receive mail.

The Web address URL with defaults to Customers using our paid email services, may have the options to change this default Web address to a branded Web address URL such as This will require a CNAME update to the DNS file.
 features a glossary of information to do with web-based email services like Internet messaging, Internet email, security, protocol, access, domains, accounts, control center, ISP, POP, IMAP, SMTP, address books, and much more.