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

42
votes
6answers
7k 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 ...
22
votes
4answers
8k 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
2k 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
1answer
2k 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
469 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 ...
0
votes
2answers
414 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: ...
8
votes
1answer
461 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 ...
1
vote
3answers
554 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
0answers
263 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 ...
1
vote
2answers
326 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
2answers
3k 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 ...
0
votes
1answer
328 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 ...