Questions tagged [opendmarc]
7 questions
8
votes
1 answer
DMARC test failed but we didn't find any obvious reason why; DMARC not passing while SPF and DKIM do
About 7 days ago, I found out on https://www.mail-tester.com that sometimes (50% of my tries over a couple of days) my company email does not pass DMARC test. As it states it does not know why, I am helpless right now and don't really understand…
![](../../users/profiles/311264.webp)
LinuxSecurityFreak
- 487
- 6
- 19
3
votes
0 answers
Using DMARC techniques to block Backscatter
We run a small email (receiving not bulk sending) service (~ 300 domains or so) for our customers and are just starting to introduce DMARC. One of the reasons for doing so is to help stop backscatter (NDRs for emails that weren't sent) by helping…
![](../../users/profiles/530476.webp)
Rob Lambden
- 260
- 2
- 6
1
vote
1 answer
How to install opendmarc on Debian Wheezy
How can I install opendmarc on Debian Wheezy?
I have tried:
~ $ echo 'deb http://ftp.debian.org/debian wheezy-backports main contrib' >> /etc/apt/sources.list
~ $ apt-get update
~ $ apt-get install opendmarc
But it's unable to find the…
![](../../users/profiles/36982.webp)
takeshin
- 1,431
- 3
- 19
- 28
1
vote
1 answer
OpenDMARC RFC5322 requirement error: not exactly one Date field
I've set up an email server for my business, and everything is working fine as long as the email addresses are accessed through Thunderbird. I've got an employee that has a license for Outlook that they've have before, and prefers to use that. When…
![](../../users/profiles/574601.webp)
Zalerinian
- 111
- 1
- 5
1
vote
1 answer
Why is opendmarc SPF failing this arriving message?
Why is this incoming message failing?
postfix/smtpd[4776]: connect from mail-mw2nam10on2073.outbound.protection.outlook.com[40.107.94.73]
postfix/smtpd[4776]: Anonymous TLS connection established from…
![](../../users/profiles/243146.webp)
Andrew
- 145
- 8
0
votes
0 answers
Postfix (SASL) and OpenDMARC-Reports
I am after suggestions on how to implement email sending of OpenDMARC-Reports. The problem I am having, is that (for obvious reasons), I have implemented SASL authentication on the smtpd server for all accounts. I have had a look at the…
-2
votes
1 answer
My OpenDMARC is rejecting emails from firefox.com . Is their SPF record correct? Or am I wrong?
Why is opendmarc rejecting mail from firefox.com? It looks like their SPF record matches their sending address and does pass:
v=spf1 mx a include:amazonses.com include:mail.zendesk.com -all
/var/log/maillog:
postfix/smtpd[19221]: connect from…
![](../../users/profiles/243146.webp)
Andrew
- 145
- 8