All Questions
35
questions
0
votes
0
answers
22
views
Should smtp_helo_name always be the same as your 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. ...
- 507
0
votes
0
answers
11
views
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 ...
- 123
1
vote
1
answer
117
views
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>...
- 13
0
votes
0
answers
39
views
Postfix - Only allow relaying when sent from local user
At the moment, our Postfix + Dovecot mail system has two types of users: those with a full account and those with only a forwarder.
Users with a full account are in the virtual_aliases table pointing ...
- 101
0
votes
0
answers
176
views
DMARC and Postfix delivery reports
I successfully set up DMARC, DKIM and SPF for my mailserver's domain, but delivery reports created by Postfix fail the DKIM/SPF tests.
The headers of regular messages (sent via my mailserver) look ...
- 267
1
vote
2
answers
3k
views
Why does DMARC fail for forwarded emails from this particular domain when it passes for all other domains?
I run a virtual mail server that forwards emails to my domain to a Gmail address, and I use PostSRSd to rewrite the addresses. For example, if someone sends an email to [email protected], my mail ...
- 365
0
votes
0
answers
176
views
postfix to gmail silent delivery failure
With the impending turndown of free hosted Google workspace accounts, I'm trying to install my own mail server using postfix/dovecot/opendkim. Mostly, it's working and for many of the services I've ...
- 131
0
votes
1
answer
2k
views
How can it be possible dkim fails whereas spf pass
I have set up a postfix which sends emails.
I have configure spf, dkim and dmarc (with p=none).
I have checked with mail-tester: spf and dkim work fine.
I have set up a dmarc rua in order to receive ...
- 429
0
votes
1
answer
5k
views
550-5.7.26 Unauthenticated email from domain is not accepted due on ERP only
I have made updates to our mail server to use DMARC. So after This our ERP system cannot send emails to gmail.com or yahoo.com but Outlook sends emails with no problems.
Below is the header for an ...
- 21
1
vote
1
answer
3k
views
Forward messages to Gmail (postfix+SRS) has DMARC failure even though SPF and DKIM succeed
I run my own domain, but forward many email addresses to my gmail account. Recently, I started seeing a lot of messages marked by gmail as spam. I have SPF set for my outgoing email, and use SRS to ...
- 2,741
-2
votes
1
answer
801
views
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/...
- 145
1
vote
1
answer
809
views
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 ...
- 145
1
vote
1
answer
740
views
Postfix send mail only to GMail, all other domains are deferred and not sended
My Postfix server is running on Debian Stretch. It is able to send emails to a GMail address without problems which are not considered as spam. At the DNS level I configured DKIM, SPF and DMARC and ...
- 11
1
vote
0
answers
2k
views
What is wrong with this e-mail which is failing SPF(mailfrom) and DMARC?
This is a follow-up from "Why is my opendmarc failing pretty much everything that comes through?". I'm really struggling to understand what is going on.
Outgoing mail is verified correctly by the ...
- 279
12
votes
4
answers
8k
views
Why is my opendmarc failing pretty much everything that comes through?
I have this domain for which I set up SPF, DKIM, and DMARC stuff. Let's pretend the domain is example.com which has the following entries in its DNS zone:
example.com. 600 IN MX ...
- 279
2
votes
1
answer
3k
views
Postfix: Managing Subdomain DMARC, DKIM, and SPF when bounce emails come from the null sender "<>"
I have several postfix servers that send mail on behalf of my domain (example.com). When a from address is provided, DKIM and SPF pass properly. However, I noticed in my DMARC notifications there are ...
- 135
1
vote
1
answer
308
views
Seemingly valid SRS-processed message is being rejected by gmail servers
I have a virtual private server with its own IP and have configured SPF, DKIM, DMARC, SRS (with postsrsd) and all that jazz. Let's call it domainut.com.
Most things are working, mail is being ...
- 131
2
votes
1
answer
2k
views
Why is OpenDMARC using my (the recipients) configuration for incoming mail?
Recently I've had some incoming emails be rejected by my mail server for failing DMARC checks. Upon closer inspection I noticed that the logs mentioned that the rejection was because OpenDMARC was ...
- 21
2
votes
1
answer
2k
views
DMARC fails on forwarded mails without DKIM
I am running a mail server (postfix) on a VPS that is set up to forward all mail sent to an address in my private domain to a GMail address. SPF, SRS, DKIM, and DMARC are set up for my mail server and ...
- 21
0
votes
1
answer
3k
views
Mail tester have 10 score, but email flagged as spam, by gmail
I have setup an smtp postfix server, with opendkim, on a domain code-gmail.com
I have put spf policy, dkim, dmarc in my domain TXT recors. I did setup reverse dns, to point correctly do my domain, i ...
1
vote
0
answers
2k
views
SPF softfail on gmail
I'm trying to setup my own smtp server with postfix and opendkim. I have publsished spf/dmarc/dkim recors, set up ptr. But currently, all my mail with any text goes into gmail spam folder. I have ...
0
votes
1
answer
3k
views
Bounced Incoming E-Mail in Gmail because of failed DMARC verification
gmail-smtp-in.l.google.com[2a00:1450:400c:c09::1a] said: 550-5.7.1
Unauthenticated email from example.com is not accepted due to 550-5.7.1
domain's DMARC policy. Please contact the administrator of ...
- 167
3
votes
1
answer
1k
views
Postfix setup with different domain name, reverse lookup and SPF
I would like to set up Postfix properly to serve multiple virtual domains while complying to all standards and being able to enable security measures like SPF.
The server has the hostname server....
- 131
1
vote
1
answer
3k
views
Opendmarc connection refused for milter
Debian stretch.
Postfix + dkim + dmarc.
Opendmarc is not working. I'm getting:
Nov 26 10:36:07 mail postfix/smtpd[30012]: warning: connect to Milter service inet:localhost:8893: Connection ...
- 231
0
votes
2
answers
598
views
DNS record check requested (spf, dkim, dmarc)
Is below correctly setup? I have 1 A record mydomain.com pointing to an ip address. I have a subdomain called www.mydomain.com that also has the PTR record for the ip address (because i'm also going ...
- 129
0
votes
2
answers
3k
views
Postfix policyd-spf reject None
How to configure policyd-spf in Postfix to reject domains with no SPF record?
The documentation doesn't specify this condition and its needed to reject spoofed/unauthorized emails on an outbound ...
- 130
0
votes
2
answers
776
views
SPF, DKIM and DMARC header order
I just recently set up DMARC on my mail server and in received mails, the order of SPF, DKIM and DMARC headers are strange. Moreover, if DKIM signature missign, there is no DMARC related "...
- 175
3
votes
1
answer
3k
views
Interpreting a DMARC report that seems to have conflicting data
I recently implemented DMARC in monitoring mode, in order to begin preparing all the domains I manage. Here is the aggregate report for yesterday. I don't understand why DKIM would evaluate to false ...
- 213
0
votes
1
answer
115
views
Does DMARC send alerts even upon successful delivery?
I keep getting DMARC reports that show that my IP passed all SPF and DKIM checks. Is this just an email to say that everything's fine or is it an indication of a problem? If the latter, there's ...
- 3
4
votes
1
answer
2k
views
correct order for Postfix milters
I use the following milters with Postfix:
ClamAV, OpenDKIM, OpenDMARC, Rspamd
This is also the order they are being called via smtpd_milters.
What would be the best order for them regarding ...
- 313
0
votes
1
answer
2k
views
DKIM, SPF, DMARC, SPF OK mails are flagged as SPAM
I have a dedicated server running CentOS7 with Postfix, the problem is that all the sent mails are flagged as SPAM by hotmail and gmail despite DKIM, SPF, DomainKeys, DMARC records and keys wich are ...
0
votes
1
answer
951
views
SPF, DKIM, DMARC, DomainKeys OK, emails flagged as SPAM [closed]
I have a new dedicated server running CentOS7 with Plesk 12.5 with postfix, and i have succesfully set SPF, DKIM, DMARC and DomainKeys as it shows this test from port25.com:
==========================...
4
votes
2
answers
3k
views
Only enable SRS when forwarding to enable DMARC
I am setting up a mail server on my VPS and in order to prevent spam and being marked as spam I have enabled SPF, DKIM and DMARC. However, I do not want to host my own mailbox, so I forward the ...
- 221
2
votes
1
answer
2k
views
Mail marked as spam (Gmail/Hotmail): IP not on blacklist, DKIM Valid, SPF Valid and DMARC valid
I'm trying to send mail from my own domain (which is 15 days old now) but I'm having some troubles. Check the following mail body:
Delivered-To: [email protected]
Received: by 10.25.89.200 with SMTP ...
- 155
1
vote
2
answers
5k
views
Configure postfix to DKIM-sign emails generated from the system
My web hosting server features a Postfix setup up and running. That postfix is also open with STARTTLS on port 587 for authorized users (only me, myself and I right now) to send emails to any domain ...
- 2,367