Email DNS Settings (MX Records) for Third-Party Nameservers

This page is showing a generic answer.
To see a more detailed answer customized for you, type your domain name here:

This page lists the DNS settings that technically advanced customers can use if they run their DNS nameservers and website elsewhere, but still want Tiger Technologies to host their email.

Most customers do not need the information on this page. We normally handle DNS service for you, behind the scenes. This page is only for customers who are doing something unusual by having another organization handle their DNS service while we handle their email service.

On this page:


If you do this, keep these things in mind:

  • We can’t handle your mail unless you have an active “hosting” account with us, because the “hosting” account package is what includes the email service. Don’t cancel your Tiger Technologies hosting service, even if you point the website elsewhere.
  • If you set things up this way when you first sign up with us, our system will still send you reminders asking you to point your nameservers at our company. You’ll have to contact us and ask us to turn those reminders off.
  • This page explains how to point email at Tiger Technologies mail servers. We have a separate page explaining how to point websites at our Web servers if you need it.

DNS entries to add

The “” shown below is a generic example.

To see the exact DNS settings to use for your account, please enter the domain name of a website hosted by Tiger Technologies at the top of this page.

The DNS entries you should create at the other company are:

@                       MX 0

@                       TXT    "v=spf1 ?all"
1.tigertech._domainkey  CNAME
2.tigertech._domainkey  CNAME

lists                   CNAME

autoconfig              CNAME

What do these do? The first entry (the MX entry) makes mail sent to addresses arrive at our servers.

The second entry is a SPF record which tells the rest of the Internet which servers are authorized to send mail for If has no existing SPF record, you can use the value exactly as it is written above. If there is an existing SPF record, you can edit and modify that record by adding:

... next to any existing include: values. If a domain name has more than one SPF record, other servers will ignore them all and act as if there were no record at all. It is important to make sure that there is only one of these type of records at any time.

The SPF record, along with the third and fourth entries (domainkey/DKIM records) ensure that you won’t have trouble sending to destinations like Gmail that do strong spam filtering. (If you omit any of these, messages sent to Gmail may bounce with the error “to best protect our users from spam, the message has been blocked. Please visit for more information”.)

The “lists” CNAME entry allows Mailman mailing lists to work, and adding the “autoconfig” entry allows the Thunderbird and Outlook mail programs to simplify the setup of new addresses in those programs.

If it’s not clear how to enter these DNS entries at the other company, you’ll need to contact them for assistance. Each company has their own procedure.