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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0
votes
1answer
39 views

Two DKIM signatures in outgoing messages

I have DKIM and SPF correctly configured on my server with postfix myserver.com. However, when I send emails from Gmail configured to authenticate and send email as myname@myserver.com ...
-1
votes
0answers
9 views

Mandrill domain verification email not being sent

We've got a Mandrill/Mailchimp account set up to send emails from a client's domain. We have valid DKIM and SPF records and Mandrill is happy with them, the only thing remaining is sending the ...
33
votes
5answers
548 views

Is it becoming impossible to be a small mail provider?

I operate a small mail server for my private emails, some friends who have websites and two NGOs. In total my server sends between 60 and 400 messages a day. Now a lot of these emails are personal ...
0
votes
2answers
16 views

Service to test outgoing mail for SPF/DKIM/SRS validity?

We're setting up a redirection-based mail server with a lot of complex moving parts, including the standard ones that apply to everyone like SPF/TLS as well as the more complex ones needed to ensure ...
0
votes
0answers
6 views

exim4 dkim only signing emails from root

I have set up exim4 on my raspberry pi, and configured exim to sign emails with dkim. This works perfectly when an email is sent from "root@mydomain.com", but when I send an email from any user other ...
1
vote
1answer
67 views

What order to split TXT records get assembled in?

As per RFC4408 3.1.3, a TXT record can be split up with quotation marks and will be reassembled properly - this is a way of getting around the 255 character limit on record size. IN TXT "v=spf1 .... ...
0
votes
1answer
16 views

Dangling CNAME Record Issue

I have been trying to setup the DKIM CNAME Signing for one of my sub domains with Amazon SES and for some reason the CNAME is behaving oddly: Eg. The following: dig @4.2.2.4 ...
-2
votes
1answer
27 views

My Email Strightly goes to gmail spam/just folder ( DKIM,SPF,DMARC is okay ) [duplicate]

( it's not duplicate , its related to rDNS , please don't flag it as duplicate or give me the link of related one ) i have a problem, my emails from my mydomain.com straightly goes to spam folder in ...
0
votes
1answer
12 views

Local mail not signed, Postfix, DKIM, Mandrill

I am running a Postfix mail server for my client. Mail is relayed through Mandrill. Mandrill requires a valid DKIM signature. This works all right for relayed mail. That is, mail sent through ...
1
vote
1answer
96 views

Number of issues with postfix, DKIM, and mail getting rejected or bulked

I'm having a number of issues with Postfix and mail sent being rejected or put in the spam/junk folder. I am trying to send emails on behalf of a number of my customers. I've got a postfix server set ...
0
votes
1answer
62 views

Using DKIM in my server for multiple domains (websites)

As I couldn't find this exact tutorial in Stack, I share my findings with al of you. I always get things solved thanks to this comunity. Thanks! Original question: I've read the tutorial posted by ...
1
vote
0answers
26 views

Unable to query DKIM because of DNS timeout

I run dkimproxy to sign outbound email and verify inbound email. Since a while, I am experiencing the following permanent problem. The dkimproxy service is unable to query the DNS. Each and every ...
0
votes
0answers
15 views

Postfix mail always in spam [duplicate]

I've installed and configured postfix trying to find the best way on the web. This is postfix main.cf: smtpd_tls_security_level = may smtpd_tls_received_header = yes smtpd_tls_session_cache_timeout ...
0
votes
1answer
1k 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
2answers
43 views

Is DMARC helpful to me if I don't need reporting?

I have SPF and DKIM setup and working for the email domain I administer. The next recommended step is to setup DMARC since SPF and DKIM are both in place. What are the benefits of using DMARC if both ...
2
votes
1answer
417 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
0answers
55 views

dkim=temperror at hotmail and dkim=pass at gmail

When i send emails to hotmail, i get dkim=temperror. However, my dkim records are good as checked by gmail. At hotmail, i get also spf=pass, X-AUTH-Result: PASS, X-SID-Result: PASS 7 days ago, i ...
-1
votes
1answer
65 views

How to create txt record

I'm trying to add a secondary dns to my dedicated ovh server. From the control panel, it says that i need to create first a txt dns record with value xxxxx and subdomain ownercheck and then continue ...
0
votes
0answers
24 views

Debugging dkim=fail using sendmail+dkim-milter

I'm setting up a CentOS server with the sendmail MTA to send DKIM-signed mail (sending domain is @brighter.do). I have succeeded in routing mails through the dkim milter; however, they arrive at my ...
-1
votes
1answer
43 views

Why does Google junk mails from my server? [duplicate]

I have a send-only mail server setup on an Ubuntu VPS. The mail server is only used to send out registration e-mails from a web application. I have the following configured: DomainKeys Identified ...
0
votes
1answer
41 views

DKIM signature and hmailserver - Your DKIM signature is not valid

I'm trying to get DKIM working on a domain using hmailserver as the mailserver, but I keep on getting Your DKIM signature is not valid This is from www.mail-tester.com The DKIM signature of your ...
0
votes
1answer
49 views

Does DMARC send alerts even upon successful delivery?

I keep getting DMARC reports that show that my IP passed all SPF and DKIM checks. Is this just an email to say that everything's fine or is it an indication of a problem? If the latter, there's ...
1
vote
2answers
174 views

would this header cause the email to be flagged as suspect?

Authentication-Results: [snip].mail.[snip].[snip].com from=someDomain.com; domainkeys=neutral (no sig); from=someDomain.com; dkim=neutral (no sig) Received: from 127.0.0.1 (EHLO ...
2
votes
2answers
186 views

Postfix header stating wrong IP

I am using Postfix 2.11.3 on Debian 8.0 I configured Postfix to run multiple instances (3), one for each public IP connected to our server in order to balance outgoing traffic depending on the ...
0
votes
0answers
85 views

How to send DKIM signed email with PHP Mail

I'm using Cacti and the PHP mail option. I want to sign my emails with DKIM I have setup rsa key, signatures, and keytable with opendkim. Opendkim conf which I added to is below taken from a tutorial. ...
2
votes
1answer
59 views

Exchange Online, Mandrill, SPF and DKIM

I have a customer ABC Ltd (abc.ie) who has a requirement to send emails via SMTP to their own customer base from within an application that we have developed for them. For their company email they ...
1
vote
1answer
17 views

OpenDKIM and canonicalization of quotes

In the long-running battle against a considerable percentage of the DKIM failures for the signatures generated on my servers, I've noted an interesting occurence. Today I've got this DKIM failure ...
3
votes
2answers
163 views

Receiving DMARC reports for emails I do not send

I am hosting the email for my domain (lets call it example.com) on google apps (free legacy edition). I recently enabled the DMARC reports so I now get a daily report for the emails sent from my ...
-1
votes
2answers
125 views

Yahoo mail authentication dkim=permerror (bad sig) [closed]

When I send emails to any yahoo account the authentication result shows the following: YAHOO RESULT: Received-SPF: pass (domain of anildagia.com designates 66.225.220.59 as permitted sender) ...
0
votes
0answers
11 views

Yahoo marked my mail as spam [duplicate]

Yahoo is marking our mail as spam. Mail header says that Domain Key, PTR, SPF all ok. From Abrabos Mon Jan 18 23:41:38 2016 X-Apparently-To: carry.vaillant@yahoo.com; Mon, 18 Jan 2016 23:45:10 +0000 ...
-3
votes
1answer
36 views

DKIM - DomainKey Identified Mail public key longer than 512 character [closed]

I've generated private key and public key using following commands. openssl genrsa -des3 -out server.key openssl rsa -in server.key -out server.key.insecure mv server.key server.key.secure mv ...
0
votes
1answer
91 views

SPF + DKIM + DMARC with Gmail account and external mail server

I,m using gmail with own domain (Google Apps) for my project. Now I want to add external mail server for sending notifications for users. Gmail doesn't give private keys for DKIM and if keys will be ...
10
votes
3answers
6k 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 ...
2
votes
2answers
321 views

Mail with DKIM Signature gets T_DKIM_INVALID flag by SpamAssassin

I've installed a Debian (jessie) box with postfix and spamassassin. Configured and everything works fine. Except receiving mails with DKIM signatur will produce a flag T_DKIM_INVALID even if the ...
1
vote
1answer
59 views

Sign DKIM on relay mail server

I found some email have header: Received: by 10.112.172.99 with SMTP id bb3csp690725lbc; Fri, 8 Jan 2016 11:37:33 -0800 (PST) X-Received: by 10.55.15.139 with SMTP id ...
1
vote
0answers
25 views

How do I use SRS rewrite the From header on a forwarded email message

I have a serious problem here. I run a labor dispatch website, where users can register their cell phones (I send them an auth code via text, they enter it at the website, it's entirely opt-in). A job ...
3
votes
1answer
2k 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 ...
1
vote
0answers
72 views

Sendmail refuses to sign messages with DKIM provided by opendkim

I have sendmail and opendkim installed on ubuntu 14.04 and would like to configure DKIM. Unfortunately sendmail refuses to sign outgoing emails with DKIM. Despite the fact that it already did ...
1
vote
3answers
40 views

DKIM: Can I simply change the RSA key used in DKIM without changing the DKIM selector?

Can I simply change the RSA key used in DKIM (DNS TXT Record) without changing the DKIM selector or will this result in any issues? If not, what's them the purpose of the DKIM selector? BTW: 20120113 ...
3
votes
1answer
147 views

correct order for Postfix milters

I use the following milters with Postfix: ClamAV, OpenDKIM, OpenDMARC, Rspamd This is also the order they are being called via smtpd_milters. What would be the best order for them regarding ...
2
votes
1answer
122 views

DKIM: Can I use a RSA key larger than 2048bit, i.e. 4096?

I wonder if I can simply use a 4096bit RSA key for DKIM (in DNS TXT Record). Are there any downsides (neglecting computational effort)? Maybe there are mail servers which can't handle a key this ...
3
votes
3answers
7k views

Domain Key not showing up in DNS query

*SOLVED - See bottom of this post * So problem here is that I have been trying to set up a domain key for several days. I've done it successfully in the past, but I just can't get it to work this ...
0
votes
1answer
51 views

Email in SPAM with Debian 8.2 [duplicate]

I have a problem (BIG PROBLEM) with SPAM. All the emails my mail server (Debian 8.2 and ispconfig latest stable) send, end up in spam. I'm using Google Apps. I did a test on spamscorechecker.com ...
-1
votes
1answer
43 views

Spam from my email address on my domain with DKIM

Someone is sending spam emails from my email address. And it looks like these emails have DKIM. How is this can be possible if they doesn't have access to that email? (my emails handles by something ...
-1
votes
2answers
41 views

What is the proper format for a DKIM type TXT value in a DNS Zone record?

I'm setting up Email Authentication and I'm seeing conflicting info on the format. Some say that the value should be surrounded in " " But other services have told me to leave out the surrounding " ...
3
votes
2answers
242 views

Why do I need to escape ; with \ in a DNS DKIM record?

I'm setting up Email Authentication on our domain to allow authentication with our Email Service Provider. My understanding is that the DNS record needs to have any ; escaped, e.g., \; I just want ...
0
votes
0answers
121 views

DKIM fail signature doesnt verify

I had setup postfix and dkim and keep on getting dkim=fail on port25 and gmail checks. DKIM check details: Result: fail (signature doesn't verify) ID(s) verified: Canonicalized Headers: ...
1
vote
0answers
18 views

DKIM verification in exim4

I'm confused about the acl_smtp_dkim. In my main config I have # DKIM verification on rcpt. acl_smtp_dkim = acl_check_dkim domainlist require_dkim_signed_mail_domains = gmail.com:paypal.com ...
0
votes
2answers
5k views

problems with opendkim and postfix centos

Hi im having problems with opendkim signing mail. check my log. i fixed the permission issue by chowning that file. but still emails are not being signed. any clues? running on centos5 with ...
0
votes
0answers
110 views

DKIM, SPF, DMARC, SPF OK mails are flagged as SPAM

I have a dedicated server running CentOS7 with Postfix, the problem is that all the sent mails are flagged as SPAM by hotmail and gmail despite DKIM, SPF, DomainKeys, DMARC records and keys wich are ...