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Managing e-mail Accounts

In Post.Office, handling e-mail with multiple domains requires no additional configuration. With this capability, Post.Office has organized e-mail addresses around mailboxes. Post.Office mailboxes can respond to e-mail addresses from any domain that your mail server is responsible (for more information on this read about mail exchangers in section 9, "Configuring DNS").

The Post.Office Account Form

The Post.Office Account Form provides a means of creating, editing, and deleting mailboxes. Mailboxes can be created by choosing the New Account form from the Post.Office administration home page. Mailboxes are edited and deleted by choosing an account from the `list' form.

General Account Information

The picture below is for an account that has already been set up. The top of the account form has three fields: user name, password, and finger info. The user's real name is required as is the account login password. The login is not the same as the user's name. The user's name is only for informational purposes and is in no way used to log into Post.Office. Finger information is optional.


The Account Form: general Info.


e-mail Address and Logins

The second part of the account form is where you specify what e-mail addresses you want the mailbox to respond to and how that mail will be handled by Post.Office. Enter all e-mail addresses desired in the field "Internet Addresses". This user will get e-mail from both the addresses shown in the below picture provided Post.Office's DNS is set up to have Post.Office handle both domain's mail.


Most accounts will have the "Mailbox Delivery" box checked. This means that all mail received will be put into this user's mailbox. If you have this box checked, you must have a login name specified. When the user logs in to Post.Office with a mail client, they will use this login name along with the password entered in t he last section and the mail host name or IP to retrieve their mailbox.


If you want all mail to this mailbox forwarded to another address, specify that in the "Forwarding Addresses" field. If you have the mailbox delivery enabled, you can also have a forwarding address and all mail will simultaneously be delivered to the mailbox and forwarded.


e-mail address and login


Security and Automatic Reply

Post.Office account security allows users to specify from what domains they are allowed to check mail from. Restricted domains are entered one to a line in the "Access Domains" field. Finger information is restricted in the same way.

An automatic reply is an e-mail sent out to anyone who sends a message to this mailbox. Replies can be vacation messages or plain automatic replies and the reply message is entered in the "Reply Message" field.


Neither of these fields are required to have anything in them.


Security and Automatic Reply


Submit the account form when you are done with the form to make it take effect. Changes are immediate and can be seen when choosing the account from the account "List" page.

Using e-mail Clients With NetTen

NetTen works with all e-mail clients that use either the POP and IMAP protocols to retrieve mail from their mail server. These e-mail clients usually have a configuration or settings page to specify which e-mail address, password and mail server should be used when retrieving mail.


e-mail clients will require the host name of the machine NetTen is running on, the user account name, account password, and the e-mail address of the user. Some mail clients ask for a separate host name for both the POP/IMAP and SMTP servers. NetTen takes care of both POP/IMAP and SMTP, so you use the NetTen host name for both these fields.

e-mail Account Names

Typically mail clients want the users e-mail or POP/IMAP account name specified in a particular format. The character `@' is often used to separate the POP/IMAP account name (or the e-mail address if the POP/IMAP account name and the e-mail address are the same) from the hostname of the mail server. For a POP/IMAP account "info" on a mail server named "NetTen.your.domain", the POP/IMAP account or e-mail address would be entered as:




e-mail addresses may contain letters and numbers and must be unique using a case insensitive comparison. Punctuation characters should be limited to period ` . ', underscore ` _ ', hyphen ` - ', and plus ` + '. Special characters like ` @()<>[]{};:'\" ' and the space character ` <space> ' must not be used, while other special characters like ` !#$%^&*= ' should be avoided to prevent incompatibility with older mailers and UUCP systems. Other than these rules on special characters, you can adopt you own conventions for e-mail addresses.

Return Addresses

The return address doesn't require the specific hostname of the machine that is providing mail service, (this is handled by the NetTen DNS MX records or Mail Exchangers). Just use the users e-mail address and the domain name. For example, for an e-mail account "sales" in the domain "your.domain" the return address should be entered as:



e-mail Passwords

Your e-mail client may require entering the password each time mail is to be retrieved from the mail server or it may have a setting to remember the password. In either case, the password must be entered exactly as it was originally given when the e-mail account was created, or in the case of the postmaster, when the postmaster's password was entered using NetTen Admin menu item.


Domain Based e-mail Multihoming

NetTen is built to handle e-mail addresses from domains other then that of the host computer. Configuring this involves setting the mail exchangers of the different domains NetTen should handle to point to the IP address NetTen is on (see section for more information on setting mail exchangers for your domain.) All that must be done after this is add e-mail addresses for the new domains in existing mailboxes or create new mailboxes with e-mail addresses for the new domains.

Once the appropriate mail exchanger for a domain is set to point to NetTen's host, any mailbox/existing user can receive e-mail from this domain. The picture below illustrates how NetTen effortlessly receives e-mail from any number of domains. The below mailbox would receive e-mail from the addresses user@somedomain.com, address@yourdomain.com, and info@anotherdomain.org as long as the mail exchangers for these domains were set to send to the NetTen IP address.


An Example of e-mail Domain Multihoming


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