DomainKeys Identified Mail is a scheme for signing and verifying email messages to confirm that that the source hasn't been forged, and is typically implemented by MTAs. The source MTA adds a header to the message body containing a signature, and the destination MTA verifies this signature against a ...
0
votes
2answers
850 views
How to avoid messages rejection because of DMARC when sent through Gmail alias?
Many people add
' another email address as alias ' for their Gmail accounts - talking here about public Gmail not Google Apps - and they may use Gmail server not their domain servers as SMTP with the ...
1
vote
1answer
311 views
Unable to install DKIM and SPF on your cPanel/WHM domain. No errors but DKIM test fails
The strangest thing.. And I'm pretty sure that the solution is fairly simple..
I'm trying to install DKIM and SPF for one of my domain hosted on a dedicated server with cPanel WHM..
I'm following ...
0
votes
2answers
20 views
Generate pfx certificate from pem rsa
I have a PEM RSA private key generated with opendkim:
# dkim-genkey -t -s code001 -d domain.com
and for use it with exchange, i need to convert it to pfx with this command:
# openssl pkcs12 ...
0
votes
0answers
17 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 ...
0
votes
1answer
107 views
DKIM in Plesk with DNS managed remotely
Our primary domains DNS is managed over at Amazon Route 53, and so in Plesk (11.x) I've turned DNS off. The problem is that I want to begin using DMARC which requires both SPF and DKIM txt records to ...
0
votes
0answers
101 views
postfix + opendkim not signing correctly. how to debug this?
EDIT: I did get a little further but all posts on my search say permissions are wrong or regenerate key but I fixed that to be 644 as well as owned by DKIM AND I keep regenerating the key but it is ...
0
votes
0answers
54 views
EXIM4 sent mail sometimes rejected, always put in spam. DKIM and SPF pass + reverse DNS
Recently I've been seeing some instances of Your access to this mail system has been rejected due to the sending MTA's poor reputation. in my maillog and have noticed that my emails have been getting ...
0
votes
1answer
38 views
What is wrong in my DKIM setup? I'm getting all fails
I own a domain name
I have implemented SPF and DKIM to avoid my mails being junked. I have also upgraded to DMARC in monitor mode.
Since I received a few failure reports recently I wanted to ...
0
votes
1answer
36 views
Can't get opendkim to work on Ubuntu
I just set up my first mail server on Ubuntu 12.04 LEMP server with Postfix and Dovecot using this guide, and it may have been the happiest day of my life to send an email to my Gmail account. The ...
0
votes
3answers
985 views
DKIM, SPF, PTR records are not working properly with my domain [closed]
I configured my server and well authenticate email system with DKIM key, SPF record and PTR records, when i start to sent out mails from phplist interface to my users ~50000, my domain is spammed by ...
7
votes
3answers
2k views
Getting Exchange to do DKIM
Having read Jeff's blog post about Email and DKIM, I'm thinking it might be good to DKIM all mail coming out of our Exchange 2003 servers. Whats a good way of going about that?
0
votes
0answers
42 views
OpenDKIM can't determine message sender from MediaWiki pear mail
Iam using http://www.mediawiki.org/wiki/Manual:$wgSMTP to send Emails from my Wiki.
Apr 7 14:29:57 x postfix/smtpd[10763]: connect from <mailserver>[127.0.0.1]
Apr 7 14:29:57 x ...
0
votes
1answer
33 views
named.conf to include zone file and opendkim conf
I would like to separate out opendkim default.txt from zone file and to be include in named.conf instead.
I'm a little bit confused on which approach I should use and which is the correct one.
...
1
vote
0answers
40 views
DKIM on postfix server but not Exchange server?
We are looking into setting up DKIM to improve email deliverability and conform better to best practices for email. We currently have two servers that can send email for a domain - one is CentOS ...
0
votes
0answers
31 views
openDKIM signing sub-domain
I followed below article to setup opendkim + centos + plesk.
http://stevejenkins.com/blog/2010/09/how-to-get-dkim-domainkeys-identified-mail-working-on-centos-5-5-and-postfix-using-opendkim/
I have ...
19
votes
3answers
6k views
DKIM sign outgoing mail from any domain (with Postfix and Ubuntu)
I got DKIM setup on my mail server (postfix and ubuntu) so it signs outgoing emails. I used these instructions:
https://help.ubuntu.com/community/Postfix/DKIM
However, I need it to sign emails from ...
0
votes
0answers
48 views
Exim 4.71 does not add DKIM signature to outgoing emails
I am trying to add DKIM to my domain, I have created a key, added the following to /etc/exim4/conf.d/transport/30_exim4_config_remote_smtp:
dkim_domain = mydomain.com
dkim_selector = mail1
...
0
votes
1answer
76 views
Mail is marked as spam although SPF and DKIM pass
I have configured Postfix to send mail from a dedicated server hosted let's on IP X.X.X.X and domain name example.com.
DKIM, SPF always pass when I send mail locally from that host but still ends up ...
0
votes
0answers
16 views
How should I configure DKIM txt DNS records so that the public key reassembles correctly? [duplicate]
When I create a DNS record for DKIM with a length of 1024 bits long, I get a record that is too long for a typical TXT record, and I need to multiple independent TXT records.
For example here is the ...
1
vote
1answer
59 views
Set up spf and dkim, where email domain and sending domain differ
I have two domains:
foo.com and bar.com
Only foo.com is using Google Apps and thus can send emails. I now have a service running on bar.com\application that uses the email application@foo.com to ...
0
votes
1answer
64 views
DKIM body hash fail
We're sending out e-mails with EXIM 4.71 from a PHP application. DKIM is enabled and is working properly, unless when sending a specific type of mails, which results in dkim=neutral (body hash did not ...
29
votes
5answers
3k views
Fighting Spam - What can I do as an: Email Administrator, Domain Owner, or User?
This is a Canonical Question about Fighting Spam.
Also related: How to stop people from using my domain to send spam?
There are so many techniques and so much to know about fighting SPAM. ...
0
votes
3answers
60 views
DKIM partial implementation
My organization has 2 mail servers. One is our MS Exchange server for corporate mail. The other is an SMTP server (not Exchange) our application uses to send automated email notifications to our ...
0
votes
2answers
562 views
cPanel Server Email to Gmail marked as Spam, SPF, DKIM, and rDNS pass
Having this issue on a cPanel server 11.34.1 that hosts multiple domains. Email originating from this box on the sendingdomain.com address is flagged as Spam by Gmail. I've implemented SPF and DKIM, ...
2
votes
1answer
51 views
What is the benefit of using DKIM to sign Content Type?
DKIM has the ability to sign headers on a per-header basis. I looked at Google's headers, and they DKIM sign ContentType.
What is the security benefit of signing ContentType?
0
votes
0answers
67 views
postfix/Exim - Mail “Scrubbing” component/filter?
I have currently a SMTP server (MTA) which handles outgoing mails from my domain. The server is DKIM & DomainKeys signing every authorized outgoing mail.
Have tried with both postfix and Exim4, ...
9
votes
2answers
424 views
How did spammer spoof emails with my google apps domain (it even has DKIM!)
I have been getting a lot of bounce-backs lately.
I thought my google apps account has been compromised, but there is no activity on my apps account, and there is certainly no malicious user that I ...
0
votes
2answers
354 views
Unable to send mail to hotmail from rackspace cloud
I'm having issue sending mail from postfix on a rackspace cloud instance for my domain.
Hotmail says "550 SC-001 (SNT0-MC4-F35) Unfortunately, messages from 198.101.x.x weren't sent. Please contact ...
1
vote
2answers
393 views
DKIM showing bad format
Setting up DKIM on my Postfix/CentOS 5.6 server.
It sends and signs the emails, but Google still showing it neutral. The errors I'm getting are:
dkim=neutral (bad format) header.i=@r02.lbsmtp.org
...
2
votes
3answers
123 views
Email won't send
2013-01-18 10:33:04 cwd=/home/USER/public_html/clients 3 args: /usr/sbin/sendmail -t -i
2013-01-18 10:33:04 1TwDwG-00023y-Ks <= USER@host.mydomain.com U=USER P=local S=3993 ...
0
votes
0answers
68 views
SPF and DKIM breaking BlackBerry BIS
I set up DKIM and SPF on our domain that uses Google Apps to host email. A few hours later, the BlackBerries that were connected to it were not letting us send out emails quoting "General Failure". ...
0
votes
1answer
71 views
How to Masquerade Sendmail Domain and Make DKIM Use the Correct Domain
I have a single domain with a dozen subdomains for different sites. Each has a separate virtual host in apache.
I configured sendmail to masquerad as the top-level domain so that emails are always ...
1
vote
3answers
258 views
Wildcard configured emails allow spammers to deliver mail? (SPF: “softfail”)
I have a Google Apps account set up for one of my domains. Wildcard email delivery is enabled on this domain for all emails (ie. anything@domain.com passes emails along to myemail@domain.com), and the ...
1
vote
1answer
372 views
Remove “via” from emails sent to Gmail from Amazon SES
When sending emails from Amazon SES, gmail shows "sent via amazonses.com". How do I remove this?
According to Google,
I'm a sender and I don't want my recipients to see the "via" link. What can I ...
0
votes
2answers
221 views
exim dkimproxy configuration - explanation?
I'm trying to setup DKIM on exim in a cPanel VPS.
I'm going with the DKIM Proxy option since cPanel is seriously dragging its feet with the it's-definitely-coming 11.32 release.
These guides here, ...
-2
votes
1answer
42 views
Modify DNS TXT Record in Domain Control Panel or Apache [closed]
I am trying to setup DKIM for email verification and have been asked to add a public key to my DNS.
Add public key in your DNS; here is a sample resource record with selector "default":
...
2
votes
2answers
40 views
What is the Value of using DKIM to sign mail when the from header doesn't match?
My domain is domain.tld, where I have DKIM functioning just fine. All of my domain emails are signed, and pass. I have a need now to send mail on behalf of my customers occasionally - ie: send email ...
1
vote
2answers
163 views
How to force postfix to use ip that is configured for domain?
I want to confirm to SPF and DKIM, this requires me to send email using the IP written in the DNS record of the domain
I have two domains example1.com and example2.com with two IPs 100.0.0.1 and ...
0
votes
1answer
41 views
speed DKIM signing in mail server
I'm running email sending campaigns with milions of emails, and I need to sign each and one of them with DKIM. Unfortunately that's the bottleneck of the process.
I wonder if I can calculate a DKIM ...
1
vote
1answer
94 views
Sendmail's maillog polluted by dkim-filter
I just added domain keys to my sendmail configuration and everything appears to be working. However, upon reviewing the maillog I get a ton of these when an email gets sent or received:
Oct 4 ...
3
votes
1answer
7k views
Yahoo Domain Keys setup, getting dkim=permerror (no key)
I'm working on getting DKIM installed on my outgoing mail server, to help my email deliverability to my Yahoo clients (all legit emails, etc, no spamming).
I've got DKIM-Signature: and ...
1
vote
1answer
58 views
DKIM for Email Service Provider clients
How would you go about implementing DKIM signing in this scenario?
You have a service that allows customers to logon to your web application, create a newsletter, and send it to their subscribers ...
0
votes
2answers
425 views
Sent mails go to spam on Gmail but not on Yahoo
Why is a message like the following going to Gmails SPAM folder?
I noticed that the same message goes correctly to Yahoo!s Inbox, but observing the header i see (in the received Yahoo message the ...
1
vote
2answers
255 views
What is the correct mail set up for multiple domains on one server?
I have a machine (centos 5) with one external ip address. On that machine I have many virtual hosts with a few different top level domain names and sub-domains under those eg.
sub1.domain1.com
...
0
votes
2answers
3k views
DKIM error: dkim=neutral (bad version) header.i=
Ive been struggling the last couple of hours with setting up DKIM on my Postfix/CentOS 5.3 server.
It finally sends and signs the emails, but apparently Google still does not like it. The errors I'm ...
1
vote
0answers
137 views
Sendmail rewriting headers after OpenDKIM signature
I have run into a problem described in section Sendmail REWRITING FEATURES on http://www.opendkim.org/README:
Due to the way the milter protocol is incorporated into the MTA, opendkim sees the ...
0
votes
1answer
215 views
Exim: How to turn off DKIM for forwarded mail?
I have DKIM configured in Exim for outgoing mail, as per the documentation. Exim signs all outgoing mail. But some of those outgoing messages are forwards, thanks to a user's .forward file. This is ...
2
votes
2answers
1k views
SPF hardfail and DKIM failure when recipient has e-mail forwarding
I configured hardfail SPF for my domain and DKIM message signing on my SMTP server. Since this is the only SMTP server that should be used for outgoing mail from my domain, I didn't foresee any ...
0
votes
1answer
357 views
How do I setup Postfix (Ubuntu) and Google Apps to DKIM sign outgoing emails?
I am using Linode and have built a LAMP stack. I setup Google Apps (free edition) to handle all incoming mail. I've also setup Google Apps to use DKIM authentication. The problem is when my ...
1
vote
1answer
81 views
DKIM, spam probability, signing with key at mail server vs sender domain?
I'm working on an email marketing tool and so far we've been recommending our customers to set up an SPF-record (Sender-ID) and a DKIM-record, we also have our own SPF-record on the mail server and a ...
