Questions tagged [dmarc]
Domain-based Message Authentication, Reporting, and Conformance (DMARC) is a mechanism by which the owner of a domain uses specially formed DNS records to express domain-level policies and preferences for email validation, disposition, and reporting.
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SPF - How does it really work?
While investigating DMARC reports I realised I do not really understand some aspects of email. I am trying to make sure I have concepts related to SPF and DMARC correct.
If an eMail message passes ...
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Has anyone configured Zoho Campaigns? [closed]
I've set up both SPF and DKIM by adding the provided TXT records in the domain authentication section of the platform. I also added a custom return path CNAME record for SPF. However, neither of them ...
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SMTP - How to send mail as @example.com when example.com cannot be used as source server/IP
I have run into a bit of an issue when attempting to set up a mail system where the parent domain, example.com, already has A records and a web server as well as many clients utilizing the parent ...
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Should SMTP HELO name be the same as the MX record?
I can't seem to satisfy HELO checks on SPF records in all cases. I have an SPF record for my domain like this:
"v=spf1 mx -all"
The MX records in the zone are:
mx0.mydomain.org.uk. ...
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openarc: can't parse Authentication-Results
I've just set up openarc on fedora38 with postfix-3.7.9. I believe it's working properly, but I have a few questions.
I'm seeing messages like this periodically. I've found another similar report from ...
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DMARC Authentication in SendGrid is expecting a different value from the current one
I have one SendGrid account [email protected], I have been using it to send transactional emails from [email protected]. When I check the account [email protected], I realized that ...
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how to add multiple DMARC entries?
I use several different services to send out emails from my domain. I already have a CNAME record for _dmarc.mydomain.com that's set to mydomain.com.dmarc.emldlv.net for one service, however, another ...
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Trying to figure out a DMARC/DKIM situation
I recently helped a friend implement DMARC/DKIM/SPF and got a report that makes no sense to me.
Their domain is hosted on SquareSpace, they use Google Apps for email, and Mailchimp for mailing lists. ...
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Understanding DMARC report - DKIM pass on SPF fail
I am looking for some help understanding a DMARC report for my email server. The xml content looks like the following:
<?xml version="1.0" encoding="UTF-8" ?>
<feedback>...
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"Undelivered Mail Returned to Sender: DMARC check failed" from forwarded mails
I'm using Procmail to forward mails to another server.
I'm often getting an error message from the recipient server:
host smtp-in.orange.fr[80.12.26.32] said: 501 5.2.0
y8XgrepnBNXb2 Mail rejete. ...
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What are these DMARC failures about?
I've been toying with dmarc off and on for the last couple of months. Currently I have no policy set. I am using URIReports for report collection and analysis. Most of the results are good. We use ...
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DMARC, SPF and DNS wildcards
My domain configuration has one domain and three subdomains, one of which is identical to the mail server's hostname:
example.com
sales.example.com
internal.example.com
mail.example.com
I initially ...
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How to get SPF alignment to pass DMARC for a subdomain?
I have the following DNS configuration:
$ dig +noall +answer -t txt example.com
example.com. 626 IN TXT "v=spf1 +a +mx include:sendgrid.net include:_spf.google.com -all"
$ dig +noall +...
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AWS-SES sending from one site, from is another site - will DMARC help or hurt
Alright, to keep this simple:
I have a project that is using AWS's SES to send transactional emails. The project is hosted on one site (let's call it example-site.com), but for reasons, the From: is ...
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This relay isn't allowed to send mail "From" gmail.com
I'm on GoDaddy and since about January 2024, I've been getting this message from various gmail and yahoo accounts: ECDHE-RSA-AES256-GCM-SHA384:256 CV=yes: SMTP error from remote mail server after end ...
