Sharing some sample record value of the post subject for future reference:
domain.gov.bd. IN TXT "v=spf1 a mx ip4:126.96.36.199 ?all"
MDaemon._domainkey.domain.gov.bd. IN TXT "v=DKIM1; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDIaJcNDjvJ6LJ/zyZCIOuaQiLMSC+FBfky8JMFE7LUGlP4LXwmpaKO3Z67x+PVXgYbbFU9nzLaFOfIXTbsCh6LYLBgQF+PNghbTAchQ59IEMrMRsTPCCg95+gKYRupN0B96Uz7rrXifZL8T+yl9MkpIlAsXXs7e8Vhzwa94NdVjQIDAQAB"
_dmarc.domain.gov.bd. 3600 IN TXT "v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:firstname.lastname@example.org; ruf=mailto:email@example.com; rf=afrf; pct=100; ri=86400"
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 of sent email, will be better to implement only one, or two, or maybe all of them, depends.
Sender Policy Framework (SPF) is an email validation system, designed to prevent unwanted emails using a spoofing system. To check this common security problem, SPF going to verify the source IP of the email and compare it with a DNS TXT record with a SPF content.
Where needs to be configured?
SPF needs to be configured in the Public DNS Continue reading “Best Practices on Email Protection: SPF, DKIM and DMARC” »