All Questions
199
questions
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
70
views
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 ...
- 103
3
votes
1
answer
533
views
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 +...
- 1,550
0
votes
0
answers
176
views
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 ...
-1
votes
1
answer
88
views
Phishing email but with SPF, DKIM and DMARC in "PASS" status
I received an email from a company that looked fine. Gmail deemed it ok. I checked the domain and the various DMARC, DKIM and SPF headers: they are all in "PASS" status. The sender's IP also ...
- 47
0
votes
1
answer
554
views
SPF spf.protection.outlook.com is invalid for messages within tenant
When sending mails through our Exchange 365 service those mails get through successfully, but if we look at the mail headers we see that where the sender and recipient are in our tenant the mail's ...
- 1,344
0
votes
2
answers
122
views
Should we add SPF records of popular email providers?
DMARC is reporting that a small fraction of our emails originate from google, microsoft, and some other providers.
DMARC is also reporting that a good chunk of those emails fail both SPF and DKIM, and ...
- 121
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
0
votes
2
answers
150
views
A Non-MX mail server + Google Workspace, is this viable?
I have a domain (example.com) configured for sending and receiving mail using Google Workspace. I need to launch additionally a separate (own) mail server. Switching completely to the new server is ...
- 2,328
0
votes
1
answer
947
views
Should HELO, MAILFROM and From use the same domain?
I configured a mail server a couple of times before and I believe back then I thought
that the answer is "yes."
But I'm about to configure another one, and it seems that I was wrong. Let's ...
- 2,328
0
votes
1
answer
1k
views
Postfix - can't send emails to gmail addresses via terminal
I have the following errors when trying to send emails to gmail addresses via my terminal:
sudo tail /var/log/mail.log
Jul 19 13:19:44 ubuntu-4gb-fsn1-1 postfix/cleanup[5780]: B4B8C5F4A3: message-id=&...
- 101
0
votes
1
answer
167
views
Mail server running on a subdomain - how could email acceptance by other servers be influenced by dns records for different ips?
I started to run a self-hosted mail server which I want to be reachable via a subdomain only. I have an A record for mail.sub.domain.tld and an MX record for sub.domain.tld /edit: which points to mail....
- 23
0
votes
2
answers
2k
views
How to setup DMARC for both AWS SES and Office 365
I'm trying to get DMARC working for the emails I send via Office 365 as well as Amazon SES. It's working for Office 365 because I setup the SPF and DKIM records in my DNS but it's failing for the ...
- 163
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
379
views
postfix configuration to prevent bounces when relaying to 3rd party (e.g. src -> my@work -> my@gmail)
i have an active mail relay that is using aliases as a main tool,
at some point we started to get bounces for some emails.
Source: somerandomsenderdomain.com
Destination: myemaildomain.com
...
2
votes
1
answer
741
views
How do i receive DMARC reports with external domains that i have no permission to control
I want to receive reports with gmail or outlook or anything else that i have no permission to add (mydomain.com)._report._dmarc.(gmail|outlook).com as a record. What i can do?
Example just like:
v=...
- 63
1
vote
1
answer
359
views
I setup DMARC p=reject on server but now I can't send via gmail to gmail (using server email From address)
Did I shoot myself in the foot ?
I mainly use gmail to send and receive emails. Support etc. My default 'send email as' profile is not the gmail address itself but an address on my server (also the ...
- 113
3
votes
0
answers
907
views
Set SPF to send email using Gmail
(Disclaimer: I totally suck at being a sysadmin)
I am sending email for a domain using Gmail. The domain is partyboatcharters.com.au (I hope I am allowed to put domains here). Gmail is configured to ...
- 807
1
vote
2
answers
343
views
Should we enhance DMARC to allow aligned DKIM enforcement?
Currently, DMARC only requires aligned DKIM or SPF.
However spoofing SPF is relatively simple for an experienced hacker:
You should only control a single IP address in the often large SPF range of e-...
- 121
1
vote
2
answers
207
views
I don't understand DMARC reports regarding my policy
My DMARC settings seems to not work as expected.
First, a few things to note:
The domain is mydomain.com (not the real one obviously) ;
The domain and mail provider is gandi.net ;
I use Amazon SES to ...
- 115
0
votes
1
answer
662
views
Email goes to spam even with valid SPF, DKIM and DMARC records, dynamic rDNS on AWS instance
I have an instance on AWS and fighting with sending emails through cPanel.
All records are OK (checked on MX toolbox): SPF, DKIM, DMARC at the cPanel level and the WHM level (hostname). Even rDNS is ...
- 101
1
vote
3
answers
501
views
SPF FAIL but DKIM PASS with my own domain
I do not understand the fail results in the following google DMARC report to our domain.
I understand that the SPF fails because the IP address is not ours but if so, how come DKIM passes?
<...
- 11
2
votes
1
answer
927
views
DKIM & SPF Allignment for Subdomains
We have a primary domain name example.com that has both adkim=s and aspf=s defined in its DMARC policy. Now, we have multiple subdomain names for this primary domain, such as postman.example.com. The ...
- 131
2
votes
1
answer
4k
views
DMARC record is valid, but your domain's None/Quarantine policy does not yet protect it against email spoofing and phishing
People,
Using the website: https://easydmarc.com/tools/dmarc-lookup?domain=name.com
I got this error:
DMARC record is valid, but your domain's None/Quarantine policy does
not yet protect it against ...
- 1,305
0
votes
1
answer
1k
views
Network Solutions DNS not always returning DKIM and SPF records
If there is a more appropriate place to ask this or it is a duplicate, please tell me.
I have a client who hosts their domains with Network Solutions. Some of their emails were bouncing due to ...
- 281
1
vote
2
answers
219
views
Does this report mean someone is attempting to send emails fraudulently or that I have things configured wrong?
Pretty new to spf/dkim and dmark.
After setting this up just this morning I already got a report on a new website. Our service eamils our users via sendgrid and the rest of the emails are sent from ...
- 907
-1
votes
1
answer
979
views
Setup bind9 dns for setup DKIM and SPF records [closed]
Currently emails from my mail server is blocked by gmail. I want to setup DKIM and SPF records for my mail server.But web domain register doesn't allow me to setup DKIM and SPF records it says I need ...
1
vote
1
answer
899
views
How to replace "via amazonses.com" with my apps branding "via example.com" for the email identities in AWS SES?
So in SES - there are two ways to verify identities as I can see:
Email identities
Domain identities
With domain identiies - it is easier to fix the "signed-by" and "mailed-by" ...
- 135
8
votes
3
answers
1k
views
Does SPF provide benefits along with DKIM+DMARC?
I have a domain I send emails from via Mailchimp and Google. I've set up DKIM for both of them and added a DMARC record too (for testing atm). I collect reports for DMARC failures and the overwhelming ...
- 181
3
votes
3
answers
698
views
How to set up DNS settings with a domain in the middle for DKIM and SPF?
I am working on a tool that helps the users send emails. I plan on using an MTA (Mail Transfer Agent) in the back end like AWS-SES or Sendgrid etc. In order for the emails to arrive successfully in ...
- 135
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
17
votes
3
answers
8k
views
SPF/DKIM/DMARC for Gmail "Send mail as" via smtp.gmail.com on external domain
Since "Google Apps" / "Google Apps for business" / "G-Suite" / "Google Workspaces" free tier is being discontinued, I need a solution to migrate my ~30 extended ...
- 279
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
3
votes
1
answer
2k
views
How is this email passing DMARC?
Today we received a spoofed email: it was sent to us "from us". (Assume we own foo.com -- real domain redacted.)
This is disturbing, as it shows as "from foo.com", yet the sender ...
0
votes
1
answer
598
views
How do I add individual mail-sending websites to my SPF record?
My company, which sends @example.co email from Google Workspace, HubSpot, and Salesforce, has the following SPF record in DNS:
v=spf1 include:_spf.google.com include:_spf.salesforce.com
include:...
- 1
2
votes
1
answer
2k
views
Why do I get DMARC aggregate reports with no reported failures (G Suite + Amazon SES)?
Domain: franzoni.eu
Such domain leverages G Suite (grandfathered free version) for receiving mail, but for various reasons (I prefer not to create users for M2M SMTP on G Suite, and I cannot use SMTP ...
- 163
6
votes
2
answers
4k
views
Why does spf fail in DMARC report from Google?
I recently received a DMARC report from Google alerting me of a few SPF failures with mail originating from IP addresses belonging to Amazon SES. A sample record is as follows (I have replaced our ...
- 187
2
votes
1
answer
2k
views
SpamAssassin: custom rules and score
For my mailserver, i want do add some custom rules and scores for spamasassin DKIM and SPF checks.
Currently i use following custom settings:
score DKIM_SIGNED 0
score DKIM_VALID -1
score ...
- 59
6
votes
1
answer
4k
views
Mail from Teams forwarded to Gmail marked as spam due to DMARC failure
When I write a chat message in Microsoft Teams the receiver gets an e-mail notification on her Office 365 account ([email protected]) when she is offline in Teams. The receiver set it up so that all ...
- 173
0
votes
1
answer
841
views
SPF/DKIM setup for a registrar's email forward
I have a number of domains with a registrar with straight forward forwards to another email address.
The system has worked flawlessly for a lot of years over a lot of domains but recently I created a ...
1
vote
1
answer
237
views
SPF/DKIM and sending emails from parent domain
I'm trying to understand how apps such as greenhouse.io configure DNS for delegating email sending.
In short, assume I am a SAAS provider saas.com and my customer is customer.com. I've seen that it is ...
- 111
5
votes
1
answer
6k
views
why is this DMARC failing verification?
I get a 6.1/10 score on mail-tester.com, where the DMARC verification is the only relevant penalty (-3).
* Your DKIM signature is valid
* Your message failed the DMARC verification
A DMARC policy ...
- 153
3
votes
0
answers
694
views
Google G Suite DMARC + SPF + DKIM for user domain aliases fail Google Admin Toolbox CheckMX
I have set up the above in my Google's old G-Suite account for a User Domain Alias but am still getting two warning messages:
https://webcoder.co.uk
There were some non-critical problems detected with ...
- 131
0
votes
1
answer
2k
views
DMARC appears to fail, multiple DKIM signatures with one matching the from address
I am using a free outlook account. In the outlook account management portal I have added an alias for my custom domain ([email protected]). With this I am able to send mails from this alias, ...
0
votes
0
answers
1k
views
DMARC, DKIM, or SPF? Emails going into quarantine
I have never had to deal with DKIM, DMARC, or SPF records before; however, our SPF record is full (10, Cloudflare) and I have a vendor whose emails aren’t making it to our mailboxes.
I made ...
- 1
0
votes
1
answer
123
views
DMARC report with passing O365 DKIM signature being sent by Google server
The dmarc report values are as follows:
dkim_domain : mydomain.onmicrosoft.com
dkim_result : pass
selector : selector1-mydomain-onmicrosoft-com
header_from : mydomain
spf_domain : mydomain
spf_result :...
- 129
1
vote
1
answer
844
views
DKIM signing for subdomain issue
I am in an environment that sends emails from different sources. We're a Google Workspace environment as well.
The flow is as such:
A user ([email protected]) in Gmail sends an email to an email group (...
- 11
25
votes
5
answers
8k
views
Does DKIM alone not solve the spam issue? Why do I need SPF?
FINAL EDIT : I was completely wrong about DKIM it seems, the signing domain does not have to be the same as the sender domain, thus the whole premise for my question is flawed. A lot of thanks to Paul ...
- 521
0
votes
1
answer
96
views
Is everything OK based on this DMARC report?
Do I understand it correct that everything is OK and I have both SPF and DKIM configured correctly based on this report from Google?
<?xml version="1.0" encoding="UTF-8" ?>
&...
- 103
6
votes
1
answer
637
views
Is email deliverability impossible with a .name email address?
I have a dot name domain. .name is an odd TLD: they originally only offered third level domains, eg first.last.name, so that more people could get their own name. They also included the first@last....
- 291