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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2answers
47 views

Spam delivered by mx.google.com despite SPF fail

Some spammer use our e-mail address as sender in forged e-mails. Now we got thousands of bounced messages from no longes existing e-mails. We set up SPF and DKIM records but it does not stop. ...
1
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0answers
24 views

How to troubleshoot marketing e-mail inbox rate / deliverability? [duplicate]

After previously using managed ESP's, we've recently switched over to our own server (CentOS 6) that's set up to send bulk e-mails with 12 IPs/SPF/DKIM. Campaigns are processed and sent via ...
-1
votes
1answer
107 views

opendkim public key not available [closed]

I'm having problems with my mail server sending or reciving mails from/to hotmail can anyone explain for newbies what all this errors on postfix log/gmail header/website dkim validator are telling me ...
1
vote
2answers
972 views

opendkim incoming not verified

I've installed opendkim with postfix on Debian Wheezy. Outgoing mail is getting DKIM signatures. The smtpd and non-smtpd milter spec is the same. Incoming mail seems not to be verified - in a ...
0
votes
1answer
103 views

How to prevent emails from my domain through mailing lists to be rejected due to DMARC

I operate my own mail server at speedofsoundgaming.com and mwtd.net. I recently added a DMARC record to my domain to help prevent spam, and once seeing that things seemed to be working, upped the ...
0
votes
1answer
183 views

Postfix milter-reject: END-OF-MESSAGE from 4.7.1 Service unavailable - try again later

I am running postfix-2.11 version and recently i have added dkim-milter-2.8 Postfix configuration: # DKIM milter_default_action = accept smtpd_milters = inet:localhost:8892 non_smtpd_milters = ...
2
votes
3answers
666 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 ...
0
votes
1answer
43 views

DKIM syntax, DNS Server rejected [closed]

I really need help on why my DNS host keeps on rejecting this entry: default._domainkey.myschool.edu.sg IN TXT "v=DKIM1; k=rsa; p=MIGfM...hZwIDAQAB;" I added our domain based on what I have read so ...
0
votes
1answer
21 views

opendkim only signs for 1 zone on a hosted server

I am implementing opendkim but I can only get it to sign for 1 zone. The tld is failing to sign even though it is the same key/signature/file for both domains. my .conf: cat ...
0
votes
1answer
48 views

How does the DKIM from SendGrid prevent me from spoofing my email adress?

I'm making use of SendGrid to send automatic emails. First I went to the whole hassle of creating a DKIM record, before I recently discovered the whole record doesn't seem to be checked anyway, ...
0
votes
1answer
41 views

DomainKeys Identified Mail (DKIM) implementation questions

I am going to set-up DKIM on my server with Exim and have the following questions: Question 1 My server hostname is domain1.com and the server is sending emails with: Return-Path: ...
53
votes
6answers
17k 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 ...
0
votes
1answer
579 views

dkim-milter appears not to be signing my emails correctly

I have a VPS that I had a fresh install of CentOS 6 on it and then I installed virtualmin on it and we've been great for a few months. I've been hosting a handful of domains from there and on one of ...
0
votes
2answers
73 views

I am able to receive mails but unable to send via my SMTP server?

I have a shared hosting server from hostgator, in which I created an email 'support@mydomain.com'. Then I enabled both DKIM and SPF (as I read on a few threads that SPF should be enabled to ensure a ...
0
votes
2answers
4k 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, ...
0
votes
1answer
70 views

DKIM signing key

when I create DKIM key like this: sudo opendkim-genkey -s mail -d example.com -s specifies the selector and -d the domain, this command will create two files, mail.private is our private key ...
0
votes
1answer
253 views

How to configure SPF and DKIM to prevent mail going to spam folder

When creating a mail with PHPMailer my emails are getting sent to the spam folder of my recipients mailbox I have been told I need to configure my SPF and DKIM correctly, I think I have done this ...
1
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2answers
40 views

DKIM domain selection

I send mails with different From and Return-Path addresses on different domains (for bounces collecting on separated mail server). For example, From: my@example.com and Return-Path: ...
0
votes
0answers
122 views

Configure SPF for gmail account

I am really new to this @ v=spf1 include:_spf.google.com ~all 1 Hour I have added the above spf setting for admin@studentclutter.com as it is a google apps email account However, I am getting ...
0
votes
0answers
68 views

Exim4 doesn't add DKIM signatures

I cannot overcome a problem with exim - it's not adding DKIM headers to my outgoing mail. support:~# cat /etc/issue Debian GNU/Linux 7 \n \l support:~# dpkg -l|grep exim ii exim4 ...
3
votes
3answers
99 views

Is there anything bad about DKIM-signing mail without the key in DNS?

At a site that I manage, we send out emails for many customer domains. Some of them have our DKIM key in DNS, some don't. From what I can tell: Signature verification failure does not force ...
1
vote
1answer
102 views

Are “via” and “on behalf of” headers determined by both DKIM and SPF?

To get rid of the "via" and "on behalf of" headers in Gmail and Outlook, do I need to set both the DKIM and the SPF records, or are DKIM records enough? We recently changed our SMTP provider from ...
0
votes
2answers
164 views

Email flagged as spam or rejected by recipient mail server

I have configured SMTP service on a windows 2008 server. All the emails sent by the SMTP service are flagged as spam or they are rejected by the recipient of the email. In the header of the email I ...
2
votes
3answers
3k 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 ...
0
votes
1answer
65 views

What is X-DKIM header for?

There are some emails with an X-DKIM header (next to DKIM-Signature) like this: X-DKIM: Sendmail DKIM Filter v2.8.2 DOMAIN SOMEVALUE However I am unable to find decent documentation for it. What is ...
1
vote
0answers
87 views

Exim mail not signing DKIM. Don't find whats wrong. (detailed description of steps taken)

I'd like to setup my fresh server (ubuntu) for hosting my www.bolleboos.be website and enable sending of email from my php scripts. So... I installed apache, php, mysql, ... and for the mail exim4 ...
0
votes
1answer
82 views

Prevent Email Going to Spam [duplicate]

I've set up my own server and I'm really struggling to stop any outgoing email go to spam. I've used allaboutspam and mail-tester.com to test it and they both come back with perfect results. No ...
-1
votes
2answers
36 views

E-mail reputation using our domain as the from sent by e-mail marketer

My boss wants to send a marketing e-mail to a large group of our customers. I personally feel that it's outside of our core business and don't support it, but that's about all I can do. Normally the ...
1
vote
2answers
429 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 ...
0
votes
0answers
197 views

AmazonSES + DKIM + Hotmail = temperror

Although SPF is passing, I'm getting a dkim=temperror on hotmail only (it's working on Yahoo and Gmail). I'm using AmazonSES, and already have the proper CNAMES for DKIM signing on my domain at ...
0
votes
1answer
33 views

Partial DKIM pitfalls?

We've recently implemented DKIM for automated emails sent out from our website (SMTP on static IP). However we cannot implement DKIM for our hosted exchange email accounts (managed hosting sends from ...
4
votes
1answer
3k 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
1answer
61 views

Postfix not using “non_smptd_milters”

Currently configuring a mail server using Postfix/Dovecot on Ubuntu 14.04 x86. At the moment I'm trying to setup DKIM using OpenDKIM. The guide I am following tells us to put the parameter ...
0
votes
0answers
196 views

new dkim config -> opendkim-testkey: record not found

I am trying to set up dkim and I cannot get it to work or test properly, and I get the following error: opendkim-testkey -vvvv -d domain.com -s default opendkim-testkey: checking key ...
0
votes
1answer
121 views

Spf dkim edit dns zone mailing issue

I am running an hosting company and i was previously affliate of hostgator. when i sent mails from my domain to my customers it would come as info@example.com via hostgator.com and mailed by ...
1
vote
2answers
530 views

What are DKIM (DomainKeys Identified Mail) and The SPF (Sender Policy Framework)?

I recently saw that cpanel has new entry for DKIM (DomainKeys Identified Mail) and The SPF (Sender Policy Framework). They seems to be talk about a mail/spam prevention, etc I would like to ...
1
vote
0answers
166 views

Hotmail/Outlook.com DKIM failure when signing with different domain - header.d ignored

We (sender.org) provide a mail server for a client (example.org) and sign outgoing messages with our private DKIM key (we cannot change the signing domain to the client's domain). Return-Path: ...
0
votes
1answer
30 views

which domain do I setup DKIM on?

I'm trying to set up DKIN on for my organizations bulk mailing operation. Our bulk mailer is on one domain, test-news.org but all our mailings have user@test.org on the from line. I'm confused as to ...
1
vote
1answer
384 views

Milter service needs transport:endpoint instead of “/var/run/opendkim/opendkim.sock”

I have set postfix with milter based on this tutorial: https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-dkim-with-postfix-on-debian-wheezy But then posptfix reported that ...
6
votes
2answers
5k 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 ...
1
vote
1answer
96 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 ...
1
vote
1answer
490 views

Spamassassin DKIM DNS issue

Here is the setup where I encounter my issues : My computer has the IP 10.6.2.5. There is a DNS server ns.isp6.lab with the IP 10.6.2.4 (I can reach it). My computer has Postfix + Dovecot + ...
0
votes
1answer
2k 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 ...
2
votes
1answer
2k views

DKIM on postfix relay server

I have a postfix/amavis relay server, with the domain name mail.example.com. It will be a relay for dozens of VPS's, which will have domains like hostname.example.net. So i have actually two ...
0
votes
0answers
109 views

DKIM error - no key

Im using PowerMTA and trying to get dkim to work. Im using godaddy DNS. Gmail is giving me : dkim=neutral (no key for signature) header.i=@ same thing with yahoo: permerror(no key) dig output: ...
2
votes
0answers
29 views

Deprecation of RSA-SHA-1 in DKIM keys?

I recently noticed that opendkim on my mail server is objecting to DKIM signatures from a client, saying their key is insecure. It may be that that's due to lack of secure DNS (confirmation?) but I ...
3
votes
1answer
662 views

Find DKIM and DMARC Records?

Is there a method to find a domain's DKIM and DMARC records using dig or nslookup? I have attempted to do the following: dig somedomain.org any returns many records, but not the known DKIM and ...
0
votes
1answer
146 views

OpenDKIM Unable to bind to port Permission Denied

I see a lot of this kind of problem, but with the "Address already in use" error and not the "Permission Denied" error I am getting. I installed OpenDKIM via this blog: ...
-1
votes
2answers
421 views

GMail detecting mail as spam [duplicate]

I've been trying for a long time to get our company's mail server send mail that will get accepted by the GMail spam filter. I have managed making it work for Yahoo Mail and Hotmail, sadly GMail is ...
1
vote
1answer
242 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 ...