Exchange + SPF + DKIM + DMARC
If you want your mail wouldn’t mark as SPAM you should configure:
1. DNS PTR records for your mail servers (usually by request to your provider (hoster))
2. SPF (TXT record in your DNS)
By online wizard from MS: https://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/
Check it: http://mxtoolbox.com/spf.aspx
3. DKIM (TXT record in your DNS)
- Download free DKIM-configurator: https://github.com/Pro/dkim-exchange/releases/tag/v2.1.4
- Enter name of a selector (e.g. selector) and generate a new key
- Create TXT records in your DNS like these:
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_domainkey.yourdomain.com. TXT “o=~;”
selector._domainkey.yourdomain.com. TXT “v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCoCH8kcKOUHIx1Gbv461a9iZYaqS3LfjGLHR1aJEQkAChMEB5xc74UeEcTWo0rx5sBAgbhUj/5nefL4K4cxFLnFIKkPZZp/e2euTsKd0c3kE3Go5vu9jERzXnsb0jAQO0K85Jfw/gQahTC4qDOce5B5REsXtMtUR8r9J+dnACpzQIDAQAB”
_adsp._domainkey.yourdomain.com. TXT “dkim=all”
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- Check the DNS-record in DKIM-configurator
- Ot the first tab click install – it will be download the latest software and install it into Exchange
- Now try to send mail and check the original – you have to see the text like: spf=pass, dkim=pass
4. DMARC (TXT record in your DNS)
Just create the record and you’ll be get reports from remote mail servers if someone will send mail with your domain name:
_dmarc TXT "v=DMARC1;p=none;fo=1;rua=mailto:admin@yourdomain.com;ruf=mailto:admin@yourdomain.com"Check it: https://dmarcian.com/dmarc-inspector/
Veeam + Adding Hyper-V host = Access denied Several Tomcat instances on the same server
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