Implementing DKIM in Zentyal MTA with SoGO Rumi, June 14, 2023 To implement this authentication mechanism, you can use a third party software called OpenDKIM. These are the steps you have to follow to deploy DKIM. 1. Install the necessary packages: sudo apt-get install -y opendkim opendkim-tools 2. Create the folder for the DKIM keys: sudo mkdir -vp /etc/opendkim/keys 3. Generate the DKIM keys: sudo… Continue Reading
Using NSLOOKUP to view DKIM records Rumi, April 14, 2022 NSLOOKUP is a quick and convenient way to verify that your DK/DKIM records are set up properly. The policy for DK/DKIM is a TXT record at this location: _adsp._domainkey.<domain.com> For the selector record you have to use: <selector>._domainkey.<domain.com> For example, do a NSLOOKUP for TXT at: c3po._domainkey.altn.com Open the Start… Continue Reading
Configure DomainKeys- DKIM (OpenDKIM) with Postfix on CentOS 7 Rumi, March 31, 2021March 31, 2021 OpenDKIM is method to digitally sign & verify emails on the mail servers using public & private keys. In other words opendkim implements the DKIM (DomainKeys Identified Mail) standard for signing and verifying email messages on a per-domain basis. DomainKeys are implemented to reduce the chances of outgoing mails to… Continue Reading
Install and integrate DKIM with OpenDKIM and Postfix on a CentOS 6 Rumi, August 24, 2019February 4, 2024 UPDATE THE SYSTEM Before going any further, make sure you’re in a screen session and your system is fully up-to-date by running: ## screen -U -S opendkim-screen ## yum update ENABLE EPEL REPOSITORY OpenDKIM is available in the EPEL repository, so we need to enable it on the system before… Continue Reading
SPF, DKIM, DMARC – Sample and perfect record values Rumi, January 27, 2019 Sharing some sample record value of the post subject for future reference: SPF: domain.gov.bd. IN TXT “v=spf1 a mx ip4:1.2.3.4 ?all” DKIM: MDaemon._domainkey.domain.gov.bd. IN TXT “v=DKIM1; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDIaJcNDjvJ6LJ/zyZCIOuaQiLMSC+FBfky8JMFE7LUGlP4LXwmpaKO3Z67x+PVXgYbbFU9nzLaFOfIXTbsCh6LYLBgQF+PNghbTAchQ59IEMrMRsTPCCg95+gKYRupN0B96Uz7rrXifZL8T+yl9MkpIlAsXXs7e8Vhzwa94NdVjQIDAQAB” DMARC: _dmarc.domain.gov.bd. 3600 IN TXT “v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:postmaster@domain.gov.bd; ruf=mailto:postmaster@domain.gov.bd; rf=afrf; pct=100; ri=86400” DMARC Generator: https://www.unlocktheinbox.com/dmarcwizard/ Continue Reading
Best Practices on Email Protection: SPF, DKIM and DMARC Rumi, August 20, 2017 Once we installed Zimbra Collaboration, we need to be aware of some additional configurations that will allow us to send emails to other Email systems with an improve Security, such Gmail, Hotmail, Yahoo!, etc. This Wiki article will show the different Email Protection resources that exists, depends of the volume… Continue Reading
DKIM installation on Debian Rumi, June 6, 2014 This is a quick and fairly painless way of setting up DKIM, on a postfix server. DomainKeys Identified Mail (DKIM) is a method for associating a domain name to an email message, thereby allowing a person, role, or organization to claim some responsibility for the message and helps verify… Continue Reading
Configuring DKIM signing in MDaemon Rumi, March 25, 2013March 25, 2013 DomainKeys Identified Mail (DKIM) is an open protocol for protecting email users against email address identity theft and email message content tampering. It does this by providing positive identification of the signer’s identity along with an encrypted “hash” of the message content. To configure and use DKIM: The system administrator… Continue Reading