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In your public DNS, change the MX record to point to the same IP as the MX used in your original domain. Once that is complete, follow the instructions in the following TechNet Article: <a href="http://technet.microsoft.com/en-us/library/aa996314%28v=exchg.150%29.aspx" rel="ugc">Configure Exchange to accept mail for multiple authoritative domains</a>.<br />
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If you are using any type of SPAM filter for incoming and outgoing SMTP traffic, then you will need to make changes to that as well to allow the new domains.<br />
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-Mike
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AT&amp;T told me I cannot have a second MX record. &nbsp;Or am I misunderstanding?
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Each domain that you registered should each have it's only set of records for the domain. So each domain would only have one MX record that all point to the same IP as your original domain.<br />
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Did you purchase the additional domains through AT&amp;T or another domain register such as GoDaddy?
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An MX record points to a mail server and that mail server must recognize the email addresses. &nbsp;You can get email-only service on Godaddy because they sell an email product separate from their web hosting. &nbsp;I don't know how you would achieve that on AT&amp;T.
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My original &nbsp;certificate was bought thru a small vendor and our second and third domain were bought thru GoDaddy.<br />
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Excuse me for being dumb but can I alias each of my other domain names to the first? &nbsp;No other services are using that domain
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I don't see how that will make your mail server recognize the new email addresses and domain names. &nbsp;To even forward email requires a mail server that will accept the email addresses in the first place.<br />
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Apparently you have two accounts here on E-E. &nbsp;What does a certificate have to do with this?
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Ok I was asked about where I bough the certificates. &nbsp;So for right now I am going to work thru AT&amp;T to see if I get the to create the MX records. <br />
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Thanks
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Creating the MX records is not really the issue... if you do not have a mail server that will accept the email addresses. &nbsp;I have about 35 email addresses on a dozen different accounts / mail servers. &nbsp;The email addresses only work on the accounts that recognize them. &nbsp;If I tried to use an email address with an account that it is not registered on it will simply bounce and not be accepted.<br />
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Example: &nbsp;Your primary account with AT&amp;T would be 'you@att.com'. &nbsp;That email is registered with and recognized on the AT&amp;T email server. &nbsp;If you have 'me@mydomain.com', it is not registered with the AT&amp;T email server so it will not be accepted by the mail server. &nbsp;It does not matter if you manage to get the MX records to point to the AT&amp;T mail server unless you can also create an account with that email address on the server.
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Thank You for all your help. &nbsp;Happy Holidays
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I purchased 2 new domain names and I would like to use them to receive email. &nbsp;I already have a MX record under my original domain. What changes do I need to make to my DNS to receive email on the 2 new domains?
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I purchased 2 new domain names and I would like to use them to receive email.  I already have a MX record under my original domain. What changes do I need to make to my DNS to receive email on the 2 new domains?

Email domain

Network Management involves issues that are independent of specific hardware or software, including email policies, upgrade planning, backup scheduling and working with managed service providers for Desktop-As-A-Service (DaaS), Software-As-A-Service (SaaS) and the like through the use of tools, coupled with manufacturer standards, best practice guidelines, policies and procedures plus all other relevant documentation. Network management also includes monitoring, alerting and reporting, management reporting, planning for device or service updates, the backup of configurations, the setting of key performance indicators and measures (KPIs/KPMs), associated service level agreements and problem records as part of the IT Service Management (ITSM) framework.

Network Management

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.