DMARC
What is DMARC?
Domain-based Message Authentication, Reporting, and Conformance (DMARC) is an email protocol, that controls what happens if a message fails authentication tests (i.e. the recipient server can't verify that the message's sender is who they say they are).
Configure DMARC
Do this for each of the domains you will use for cold emails.
DMARC is a bit more tricky to understand and set up, but I'll explain the required steps.
First, read these to get an understanding of the concept and the parameters:
- https://support.google.com/a/answer/10032169
- https://support.google.com/a/answer/2466563#dmarc-record-tags
In your DNS provider (e.g. Cloudflare), within DNS configuration, add a text record:
| Type | Name | Content | Proxy Status |
|---|---|---|---|
| TXT | _dmarc | v=DMARC1; p=none; rua=mailto:[email protected]; pct=25; adkim=s; aspf=s | DNS only |
Note: Earlier, you added the email address [email protected] as an alternative address of [email protected]
Every 7 days, edit the _dmarc record and increase these values:
| Day | p value | pct Value |
|---|---|---|
| 0 | p=none | pct=25 |
| 7 | p=none | pct=25 |
| 14 | p=quarantine | pct=50 |
| 21 | p=quarantine | pct=75 |
| 28 | p=reject | pct=100 |