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Constant Contact

Supports SPF Supports DKIM

How to Set Up/Modify SPF for Constant Contact

The following description addresses how to update a Domain Name Service (DNS) record to use SPF with your custom domain in Constant Contact.

To utilize a custom domain, the Constant Contact provider requires an SPF TXT record be added to the DNS record. This TXT record is then used by DNS to recognize email servers allowed to send messages on behalf of your custom/third-party domain. To determine whether a correspondence from the specified domain comes from an authorized messaging server, the recipient system relies on the implemented SPF TXT record. At that point, the message is either accepted, quarantined, or rejected by the email receiving system.

To implement SPF authentication for your domain, you will need access to your DNS records in the domain hosting account. Important: If you already have an SPF record, then you should modify that existing record. You must not have more than one SPF record.

For convenience, be sure to log in to your Constant Contact account to verify your domain and copy your TXT records. Constant Contact utilizes an include mechanism during the set-up process. For example, if you do not have an SPF record on your domain, the following scenario is the most common and would pass SPF:

v=spf1 ~all

If you do already have an SPF record on your domain, simply add the following to it:

To create an SPF record for your domain name, follow these steps:

1. Log in to Constant Contact account

2. Under My Settings tab, choose Authentication as active

3. Create a TXT record with the following specifications:

v=spf1 ~all

4. Decide how you want to enforce SPF failures:

~all results in a soft fail (not authorized, but not explicitly unauthorized)

-all results in a hard fail (unauthorized)

?all is neutral (similar to no policy)

As shown above, enter your choice after v=spf1

5. Save changes

How to Set Up/Modify DKIM for Constant Contact

DKIM is an industry-standard method for associating a domain name to an email so the recipient can validate the legitimacy of the message. Moreover, DKIM requires two TXT records to be created in your DNS configuration. To enable DKIM set up for approved senders, follow the below steps:

1. Notify Account Review and Deliverability you want to self-publish for authentication

2. Inform them which domain you will be using

3. Your authentication keys will be generated and emailed to you

4. Syntax for the name of TXT record will be generated and emailed to you

5. Contact your domain administrator (or other) to create authentication records in DNS

6. In My Settings, change email you send from to your domain-based email

As a user of this outbound email provider, Constant Contact customers are afforded DKIM signing because it supports that mechanism. By utilizing Constant Contact’s DKIM set up via provider request, you can rely on their assistance to have this protocol enabled. Overall, this Constant Contact product provides beneficial components (e.g., DKIM signing, custom DKIM records, provider set up by request with TXT records) that result in a streamlined process.

DKIM/SPF Setup Highlights

The below sections highlight notable characteristics of setting up DKIM and SPF for this provider as well as highlighting advanced settings if offered by this Outbound Email Source.


SPF Include Tag Required

This outbound email provider uses an include mechanism to add this provider's IP space to your SPF. To get fully set up with SPF for this provider, you will need to take the provided “include” domain and add it to your SPF record. An example of an SPF record without an include tag is compared to one with the tag added below (the include tags added are denoted in bold).


Initial SPF Record:

HOST TEXT v=spf1 ~all


SPF record include added:

HOST TEXT v=spf1 ~all


This outbound email provider does not allow a custom Return-Path address to be set. 


Supports DKIM Signing

Yes, this outbound email provider supports DKIM signing.

DKIM Setup via TXT record

This outbound email provider uses a TXT record to initiate DKIM set up. You will need to take the TXT record(s) provided to you by the provider and add them to your DNS via your DNS hosting provider.

An example of a DKIM TXT record is shown below.

HOST TEXT k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDPtW5iwpXVPiH5FzJ7Nrl8USzuY9zqqzjE0D1r04xDN6qwziDnmgcFNNfMewVKN2D1O+2J9N14hRprzByFwfQW76yojh54Xu3uSbQ3JP0A7k8o8GutRF8zbFUA8n0ZH2y0cIEjMliXY4W4LwPA7m4q0ObmvSjhd63O9d8z1XkUBwIDAQAB

This outbound email provider allows custom DKIM records to be setup.

This particular outbound email provider requires that the customer (you) contact them to request DKIM to be added to your account and to receive the necessary steps to integrate DKIM.