DMARC Registration

by trace-admin | Nov 19, 2023 | Google Workspace configuration

The DMARC register (Domain-based Message Authentication, Reporting, and Conformance) is used to improve email security by specifying how an email service should handle messages that fail the SPF and DKIM authentication tests.

To set up a DMARC record for Google Workspace, your domain's DNS record might look something like this:

v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;

In this example:

v=DMARC1 indicates the version of the DMARC record.
p=none defines the policy for handling e-mails that fail DMARC tests. none means that no specific action is taken, but this can be changed to quarantine (send emails to quarantine) or reject (reject emails) depending on your needs.
rua=mailto:[email protected] specifies where the aggregated DMARC reports should be sent. Replace [email protected] with the e-mail address where you want to receive these reports.
ruf=mailto:[email protected] indicates where forensic failure reports should be sent. Replace [email protected] with the appropriate e-mail address.
fo=1 determines the conditions under which forensic failure reports are generated. 1 means that reports are generated if there are failures in SPF or DKIM.

Remember that DMARC configuration must be done carefully, as misconfigured policies can affect email delivery. It is therefore advisable to start with a policy none and monitor reports before moving on to more restrictive policies such as quarantine or reject.

It is also essential to replace the e-mail addresses in the fields street e ruf their own e-mail addresses to receive DMARC reports.

Address [email protected]

by trace-admin | Nov 19, 2023 | Google Workspace configuration

The "postmaster" e-mail address is a standard convention used in e-mail system administration. Traditionally, "[email protected]" serves as a central point of contact for email-related issues for a specific domain (in this case, "example.com").

Here are some important aspects of the "postmaster" e-mail:

Purpose:

It is intended for e-mail administration and system maintenance.
It serves as a point of contact for external email-related problems, such as delivery issues, spam reports, and authentication problems (SPF, DKIM, DMARC).

Internet standard:

The existence of a "postmaster" address is a requirement defined in the Internet e-mail standards, specifically in RFC 5321.
This standard ensures that there is always a way to contact someone responsible for a domain's email services.
Technical issues and abuse:

System administrators use the "postmaster" address to receive notifications about technical problems, such as delivery errors, bounces, and other routing issues.
It is also used to report email abuse, such as phishing or spam activities originating from the domain.
Maintenance and monitoring:

The address should be monitored regularly by an administrator or IT team to ensure that critical issues are attended to promptly.
Ideally, it should be configured to accept emails from any source, to ensure effective communication about email problems.
Privacy and Security:

Due to its nature, the "postmaster" address can be a target for spam. It is therefore important to have appropriate filters and security measures in place.
It must be managed in such a way as to protect the privacy and security of incoming communications.
In short, the email "postmaster" is a vital part of a domain's email infrastructure, offering an essential communication channel for email administration and security-related issues.