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 ...

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59
votes
6answers
20k 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? What are SPF records, and how do I configure them? There are ...
24
votes
4answers
12k 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
1answer
3k 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 ...
3
votes
1answer
4k views

How do I use OpenDKIM with multiple domain names on a single server?

How do I use OpenDKIM with multiple domain names on a single server? I own 3 domain names, and I have a single server that's running postfix for sending email. How do I use OpenDKIM? Can I use the ...
2
votes
1answer
3k views

ive got dkim=neutral (bad version) header.i with gmail and dkim=fail (unknown key type) with yahoo

I'm having external ip and ubuntu server with exim4.71 and bind9. I'm trying to set valid dkim entry to send mail for gmail Here are my configuration files: bind9: _domainkey.example.com. IN ...
0
votes
1answer
489 views

adding DKIM signature to email where dkim=pass

I am building a e-mailing app and I am using Amazon SES API to send emails and long with that I am adding the DKIM signature to the email which are being sent. Presently the app is in the testing ...
1
vote
2answers
644 views

Postfix sends email to spam (gmail, hotmail)

I recently installed a postfix + dovecot + dkim multi domain, multi user, multi alias mail server on my debian squeeze system. Everything works except for one big issue that basically makes the whole ...
0
votes
2answers
552 views

Getting started with DKIM / DomainKeys

I'm using WinServer to generate and send emails via my Goggle Apps-hosted domain (my SMTP server is smtp.gmail.com) . My registrar (Network Solutions) supports Text records - so I should be able to ...
0
votes
2answers
3k 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: ...
9
votes
1answer
535 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 ...
3
votes
3answers
4k views

no signing table match in OpenDKIM

I have OpenDKIM installed on CentOS. I am using postfix as MTA and dovecot for IMAP/POP3. Now the problem is am trying to setup DKIM for my domain. The mails are send from a sub domain ...
3
votes
2answers
5k views

How do I enter a strong (long) DKIM key into DNS?

I'm trying to enter a 4028 bit DKIM key into DNS and it seems that I'm exceeding both the UDP 512 byte limit and also the maximum record size for a TXT record. How does someone properly create a ...
1
vote
1answer
287 views

How to setup Postfix with Opendkim to automatically sign PHP emails?

I've found that: submitted emails are signed properly (ie those sent with MUA's like Outlook and Thunderbird) command-line sent emails are signed properly emails sent with PHP, in particular case ...
1
vote
1answer
1k views

How to correctly configure postfix and opendkim and let receiving server know all details mailed-by signed-by?

What I am trying to achieve - Bottomline: mails to go in inbox rather spam folder. I have a server which is running postfix (mail server) and I have 3 domains. Mail server is used for both incoming ...
1
vote
1answer
1k views

Configuring SPF, DKIM, Reverse DNS for VPS sending email through Google Apps SMTP servers

Today we realized that all of our emails being sent to email addresses of the type <username>@corporatedomain.com were getting rejected. I don't know who is hosting the email for ...
1
vote
3answers
731 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
2answers
448 views

dkimproxy unable to read private key

I just found this error in my server logs May 17 14:55:07 marcus dkimproxy.out[1005]: signing error: Error: cannot read /etc/ssl/private/dkim_server/dkim_server.key: Permission denied dkimproxy ...
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
180 views

Mails going to spam. Please see the details [duplicate]

My hostname is properly set up. Host file has proper entries. Mail header shows SPF pass. IP is not balcklisted. Mail body is also fine. Only thing don't have is DKIM setup. Now I have got two ...
0
votes
3answers
6k 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 ...