Set up DNS records for email and Hosted Lync


To complete the configuration of your hosted implementation of Microsoft Lync or Microsoft Exchange, or of your Rackspace Email, you must set up DNS records. If incorrect DNS settings are associated with your domain, you will experience problems using these applications.

Set up DNS records for email

This section provides information about the DNS records that you need to set up for email transfer. Create the following entries on your DNS server:

MX Records

Autodiscover Record

SPF Record

Set up DNS records for Hosted Lync

MX records

A mail exchange, or MX, record directs incoming email sent to your domain to the specific server set up to accept email traffic for your domain. For example, if your email is hosted through Rackspace you have MX records that point to mx1.emailsrvr.com (10) and mx2.emailsrvr.com (20).

Set up the following MX records on your DNS server.

Hostname Time To Live (TTL) Record type Destination Priority
Blank or @ 3600 MX mx1.emailsrvr.com 10
Blank or @ 3600 MX mx2.emailsrvr.com 20

Note: To change the settings for your domain, you must own and have access to edit these records. If you do not have access to do so, contact your DNS provider. Typically it takes between 24 and 48 hours for changes to DNS records to fully propagate. We recommend updating your DNS records during the off-peak traffic hours to allow for DNS propagation. No mail is lost during this time.

 

Autodiscover records

Autodiscover is a service that enables you and your team to easily configure your email clients, knowing only your Rackspace Email or Microsoft Exchange email address and password. Autodiscover enables additional features for Microsoft Exchange mailboxes such as downloading the offline address book, viewing free and busy time in a calendar, and using the Out-of-Office Assistant.

Note: Autodiscover is not compatible with Outlook 2011 or Mac Mail.

To enable Autodiscover, set up the following Canonical Name (CNAME) record. Replace example.com with your own domain name.

Hostname Time To Live (TTL) Record type Destination
autodiscover.example.com Lowest possible CNAME autodiscover.emailsrvr.com

 

SPF records

The Sender Policy Framework record, or “SPF” Record, is a DNS record designed to combat and reduce spam for your domain. SPF records helps mail servers identify unauthorized use of your domain in the form of forgeries (spoofing). SPF records also help improve your email deliverability rate by preventing the email that you send from landing in a recipient’s spam or junk mail inbox.

To have an SPF record implemented, contact your DNS hosting provider, and have them add the following TXT record to your DNS.

Hostname Time To Live (TTL) Record Type Destination
Blank or @ Lowest possible TXT v=spf1 include:emailsrvr.com ~all

 

Set up DNS records for Hosted Lync

To complete the configuration of your hosted implementation of Microsoft Lync, you must set up DNS records. Create the following entries on your DNS server:

Note: If you have an internal DNS, you must also set up these records up on your internal DNS.

CNAME records

The following records are Canonical Name (CNAME) records, which are often referred to as alias records.

Replace example.com with your own domain name.

Host name

Type

Time to live (TTL)

Points to

autodiscover.example.com

CNAME

Lowest possible

autodiscover.emailsrvr.com

lyncdiscover.example.com

CNAME

Lowest possible

lyncdiscover.mex06.emailsrvr.com

sip.example.com

CNAME

Lowest possible

sip.mex06.emailsrvr.com

Service records

The following records are Service (SRV) records. An SRV record is a specification of data in the DNS that defines the location (host name and port number) of servers for specified services. You must define both of the following SRV records.

Replace example.com with your own domain name.

Service

Protocol

Host (Domain)

TTL (seconds)

Priority

Weight

Port

Target

_sip

_tls

example.com

3600 0 0

443

sip.example.com

_sipfederationtls

_tcp

example.com

3600 0 0

5061

lync01.mex06.emailsrvr.com

 

 



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