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SendGrid

Supports SPF Supports DKIM

How to Set Up/Modify SPF for SendGrid

To utilize a custom domain, the SendGrid 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.

SendGrid uses an include mechanism during the set-up process. If you do not have an SPF record for your domain, you must create a TXT record with the following value:

v=spf1 include:sendgrid.net ~all

If you already have an SPF record for your domain, simply add the SendGrid include mechanism lookup into your existing record. For example:

v=spf1 include:_spf.google.com include:spf.protection.outlook.com include:sendgrid.net ~all

How to Set Up/Modify DKIM for SendGrid

Whether you utilize a shared or dedicated IP, SendGrid automatically enables DKIM for all email to improve deliverability. To implement DKIM for the SendGrid platform, follow these steps:

  1. Publish two CNAME records for your custom domain at DNS host (Note: Sendgrid will provide these records to you).
    1. Sendgrid records currently use the following format:

      Host name: selector1._domainkey.<domain>

      Points to address or value:selector1-<domainGUID>._domainkey.<initialDomain> 

      TTL: 3600

      Host name: selector2._domainkey.<domain>

      Points to address or value:selector2-<domainGUID>._domainkey.<initialDomain> 

      TTL: 3600

  2. Enable DKIM signing for your custom domain in SendGrid

An example of enabling DKIM signing for your custom domain is as follows: New-DkimSigningConfig -DomainName yourdomain.com -Enabled $true

Moreover, an example of a SendGrid DKIM record with automated security enabled looks like:

subdomain.yourdomain.com. | CNAME | uXXXXXXX.wlXXX.sendgrid.net

s1.domainkey.yourdomain.com. | CNAME | s1.domainkey.uXXX.wlXXX.sendgrid.net.

s2.domainkey.yourdomain.com. | CNAME | s2.domainkey.uXXX.wlXXX.sendgrid.net.

As a user of this outbound email provider, SendGrid customers are afforded DKIM signing because it supports this mechanism. By utilizing SendGrid’s self-service portal, you can manually set up DKIM at your convenience via CNAME records mentioned above. Although this SendGrid product does not allow custom DKIM records to be implemented, it provides other beneficial components (e.g., DKIM signing, self-service set up with CNAME 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

This email provider allows its users to setup SPF via an include mechanism or a CNAME record. Based on your plan with the provider one of the two options may be more optimal.

 

DKIM

Supports DKIM Signing

Yes, this outbound email provider supports DKIM signing.

DKIM Setup via CNAME

This specific email provider relies on a CNAME record (or multiple records) for DKIM set up. Below is an example a typical  CNAME Record for setting up DKIM. The HOST section will typically contain a unique name followed by the domain name you are creating the record for (In the below "s1.domainkey" is the unique name followed by the domain of "yourdomain.com". The ADDRESS section will outline where mail receivers should look for a DKIM record for the domain. Both of these values are typically auto generated when you setup DKIM via an outbound email source.

HOST ADDRESS
s1.domainkey.yourdomain.com. s1.domainkey.uXXX.wlXXX.sendgrid.net.

 

No Custom DKIM records

This outbound email provider does not allow for any modification to the DKIM records they have provided to you.

DKIM Setup Process: Self-Service Dashboard

This email provider offers a self-service dashboard where DKIM records will be setup for the account. To get DKIM setup for this provider you will login to your account at this provider and proceed to the DKIM setup area.

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