How does DMARC work?
Posted: Sat Feb 01, 2025 10:18 am
DMARC combines the functions of SPF and DKIM and extends them. Either the domain of the from and envelope address must be identical so that the SPF entry applies to both addresses (the so-called "SPF alignment") or, with DKIM, the signature and sender domain must match (the so-called "DKIM alignment").
The DMARC entry is made in the DNS record of the sender domain and defines for the mailbox provider how to handle emails that use this sender domain but do not pass the SPF or DKIM check (including SPF or DKIM alignment). Such emails are usually spam or phishing emails that pretend to be from a false sender. These emails can still be delivered, quarantined (i.e. in the spam folder) or not delivered at all, according to the definition in the DMARC entry.
In addition, DMARC provides reporting for sender afghanistan phone number data domain owners so that they can determine who is sending unauthorized emails with their domain in the sender.
flow of the DMARC process
Process of DMARC validation by the mailbox provider
DMARC introduction in 5 steps
The prerequisite is that you already use DKIM and SPF as a basis (almost all AGNITAS customers meet this requirement; it is important that your DKIM entry was made for your own sender domain).
Make sure that all your mailers match the identifiers of DKIM or SPF. The "RFC 5322 From Domain" must match the domain used in the SPF and/or DKIM records. In case of using SPF and DKIM, only one identifier must match.
Create a DMARC record. Three different deliverability rules can be defined within the policy: reject, quarantine or none. If you first set the deliverability rule to "none" (no action), you have the option of correcting errors using the reports.
Analyze the data in your reports and adjust your entry.
Change from “none” to “quarantine” and finally to “reject” according to your experiences.
Does it all sound a bit complicated?
Here you can find all the information in detail from our partner Return Path: DMARC Guide
Make sure that your company and your brand are not abused by spam mailers and use DMARC.
We are also happy to advise our customers.
The DMARC entry is made in the DNS record of the sender domain and defines for the mailbox provider how to handle emails that use this sender domain but do not pass the SPF or DKIM check (including SPF or DKIM alignment). Such emails are usually spam or phishing emails that pretend to be from a false sender. These emails can still be delivered, quarantined (i.e. in the spam folder) or not delivered at all, according to the definition in the DMARC entry.
In addition, DMARC provides reporting for sender afghanistan phone number data domain owners so that they can determine who is sending unauthorized emails with their domain in the sender.
flow of the DMARC process
Process of DMARC validation by the mailbox provider
DMARC introduction in 5 steps
The prerequisite is that you already use DKIM and SPF as a basis (almost all AGNITAS customers meet this requirement; it is important that your DKIM entry was made for your own sender domain).
Make sure that all your mailers match the identifiers of DKIM or SPF. The "RFC 5322 From Domain" must match the domain used in the SPF and/or DKIM records. In case of using SPF and DKIM, only one identifier must match.
Create a DMARC record. Three different deliverability rules can be defined within the policy: reject, quarantine or none. If you first set the deliverability rule to "none" (no action), you have the option of correcting errors using the reports.
Analyze the data in your reports and adjust your entry.
Change from “none” to “quarantine” and finally to “reject” according to your experiences.
Does it all sound a bit complicated?
Here you can find all the information in detail from our partner Return Path: DMARC Guide
Make sure that your company and your brand are not abused by spam mailers and use DMARC.
We are also happy to advise our customers.