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 ...

learn more… | top users | synonyms

0
votes
2answers
2k views

Gmail uses both DKIM and DomainKeys, while Hotmail uses none?

I noticed that Gmail messages have both a DKIM-Signature header and a DomainKey-Signature header, while Hotmail messages have none. What is the purpose of using both DKIM and DomainKey signatures, ...
0
votes
1answer
881 views

DKIMPROXY signing wrong domain

Just.... wont sign a thing... The dkimproxy_out.conf: # specify what address/port DKIMproxy should listen on listen 127.0.0.1:10028 # specify what address/port DKIMproxy forwards mail to relay ...
0
votes
2answers
1k views

How to install dkim for postfix in centos 5.4

I am trying to install DKIM for my postfix so that i have a signature. I am following this guide: http://allaboutlamp.com/2009/09/setup-dkim-for-postfix-in-fedora-using-dkim-milter/ But how do i ...
0
votes
1answer
845 views

Opendkim verification when using Dspam

I have Opendkim working well for signing messages but verification fail, I guess that's because emails are injected from Dspam on 127.0.0.1:25000 so Opendkim try to sign the mail instead of verifying ...
0
votes
1answer
766 views

DKIM and Request-Tracker Headers

I have a domain that sends two different types of emails: ones that are created via automated processes like notifications that go out to users, and ones that are generated from Request Tracker (the ...
1
vote
3answers
919 views

Transactional Emails from my server goes directly to Spam folder of users in Yahoo

I am trying to setup our website portal to send registration confirmation emails to customers who sign up (its a simple message containing a link that confirms the email of the user). Everything is ...
5
votes
2answers
3k 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 ...
6
votes
3answers
1k views

DKIM vs Domain Keys

I've configured DKIM (milter-dkim) on my mail server. Incoming e-mail sent from my domain now containts the following header: X-DKIM: Sendmail DKIM Filter v2.8.3 MYDOMAIN.com o7FLH1Wa032083 DKIM-...
0
votes
1answer
2k views

dkim signing is failing (according to spamassassin) and I need details to solve it

I am using qmail and libdkimtest to sign outgoing emails. The setup is almost exactly as per this tutorial (http://patchlog.com/security/qmail-and-dkim/). Emails I send out have a signature added, ...
1
vote
3answers
3k views

dkim-filter key retrieval failed

I've set up dkim-filter on my mail server. I've set up postfix to use dkim-filter as the milter; However, I'm getting the following in my logs: Jul 7 13:00:29 magni postfix/smtpd[6742]: connect ...
0
votes
1answer
110 views

What is the best approach for setting up a good, secure smtp server on Debian?

Which server do you recommend? (postfix?) Which configuration for authenticating users for sending mail? Which setups for making it inbox friendly (dkim, spf, domainkey etc)? Is there some detailed ...
1
vote
1answer
827 views

Replacement for windows SMTP server that supports DKIM signing

Can you recommend a SMTP server/component to replace the SMTP service that is available in Windows Server 2008. I would like the SMTP server to support the same feature set as the built in SMTP ...
6
votes
3answers
6k views

Setting up DKIM for multiple domains on same host

I have DKIM set up for one domain and it works properly. I am trying, though, to set it up for another domain name on the same machine. In short, I am sending registration and password recovery emails ...
0
votes
2answers
4k views

Yahoo flagging mail as spam when using relay server

I'm using Postfix to relay mail from my site to my mail server. Mail is received properly at my Gmail and Hotmail accounts - only Yahoo is the problem. The Yahoo mail headers state: Received-SPF: ...
5
votes
2answers
2k views

What are the advantages of DKIM?

After making my server sign outgoing email I started to wonder what the benefits are. This is the opposite of a previously asked question. Naively I see two benefits: We can throw away all emails ...
1
vote
3answers
398 views

Should DKIM signing happen in the application or the MTA?

I'm trying to weigh up whether DKIM signing should be done by the application sending mail (for instance, the mailing list software you're using) or at the mail transfer agent (sendmail, postfix etc). ...
7
votes
4answers
9k 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?
2
votes
2answers
229 views

How important is sender validation, and what matters?

When I started learning how to configure email, SPF existed but there were doubts about whether it was a good thing, and the value of offering SPF records in DNS. Now it seems that it is widely ...
0
votes
1answer
996 views

DKIM passes everywhere apart from Yahoo!

I'm using dkim-milter, Postfix on Ubuntu (I think I used these instructions for setting up). Anyway, using the reflectors such as Port25, BlackOps and Altn.com I get passes for DKIM: X-DKIM: OpenDKIM ...
0
votes
1answer
4k views

I can't send email from my server to gmail addresses

I'm using postfix, and have setup spf, dkim, and domainkeys. I can get my email to go to Yahoo, but not gmail. Here's the headers from an email send to Yahoo. Yahoo reports the email as domain key ...
1
vote
3answers
7k 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 ...
10
votes
1answer
651 views

Are there any pitfalls to DKIM?

We are considering implementing DKIM, the pros seem pretty obvious. Are there any cons? I know this is a bit vague and possibly subjective so I will accept what seems to me to be the most complete ...
0
votes
1answer
3k views

Emails are going to spam

Hey guys, I am currently running exchange 2010, I have implemented SPF record, and tried to implement dkim/domain keys using domain sink, but it doesn't seem to work. The problem I am having is that ...
2
votes
2answers
414 views

SMTP server on Win2008, SPF ecc

I want be able to send outgoing email from my website. I want to setup Win2008 smtp to be able to send them respecting all the spam rules. My checklist is: the smtp should be able to accept ...
-1
votes
1answer
521 views

Debian Unstable + Postfix 2.6.5 + dkim-filter 2.8.2 issue

I have Postfix installed on Debian Unstable, as the title states, the system is completely up-to-date, I have tried to get DKIM signatures working on outgoing mail using dkim-filter 2.8.2. I couldn't ...
1
vote
3answers
3k views

Emails is marked as spam

Hi We have set up the DKIM in our mail server using sendmail and configured our DNS record also. Still our mails are marked as spam. Also when we sent the mail from outlook the domainkey ...
0
votes
1answer
146 views

Changing DNS Name checking

using windows 2003 Server with DNS service brought me to the option of "name checking". Our current setting is "RFC only". This settings prohibits names with underscore at the beginning, which is ...
1
vote
2answers
1k views

Postfix & DKIMproxy woes: Connection Refused

I have my server setup exactly like this article here: Getting DKIMproxy installed and configured, yet I am having the following issue. When I go to send an email to my server through port 587, I get ...
28
votes
4answers
16k 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 ...
4
votes
2answers
2k views

Postfix with DKIM on Ubuntu

I want to improve deliverability for my outgoing emails with DKIM. I've gotten dkim-filter installed for postfix, using this tutorial https://help.ubuntu.com/community/Postfix/DKIM It seems to be ...
4
votes
1answer
11k 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 DomainKey-...