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Configure SPF and DKIM With Postfix on Debian 9

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#3 007 ouverte le 22 déc. 2019

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Description

Update the guide based on comments in DisQus:


Oh I managed to find out the problem with the second debian server, ownership and permissions on the sock file chown -R opendkim:opendkim /var/spool/postfix/opendkim chmod -R 755 /var/spool/postfix/opendkim


postfix/smtpd[1712]: warning: connect to Milter service local:opendkim/opendkim.sock: Permission denied I think we need: chown -R opendkim:postfix /var/spool/postfix/opendkim after opendkim.sock creted.


For those who have their own DNS server: after create and move opendkim key I have troble with inserting YYYYMM._domainkey in ZONE record file. The solution is to copy the whole context of example.txt file in DNS domain record file, append example.com after _domainkey, remove "rsa-" after h= ant that its all. I use bind 9.10.3, opendkim 2.11

nano /var/lib/bind/example.com.zone

$ORIGIN . $TTL 5m ; 5 minutes example.com IN SOA ns1.example.com. admin.example.com. ( 2018122271 ; serial number YYYYMMDDNN 28800 ; Refresh 7200 ; Retry 864000 ; Expire 86400 ; Min TTL ) NS ns1.example.com. MX 10 mail.example.com. TXT "v=spf1 a mx ~all" A 79.116.23.17 AAAA 2001:40:29:1::1 201903._domainkey.example.com IN TXT ( "v=DKIM1; h=sha256; k=rsa; s=email; " "p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBxgKCAQEA0pQHmeS1yQT1ORlbQdlQ+uQEW5ArBAZ3Xlc3Tt4CsFnObeECygcK7c09ByQjpwWo2CmffNmYYJ26Mx+kXcWxzZBB0g0OchhblkJbPmYyfPbxoaEXONUIe6zUQTvyr3IVScs/5DyxXO5yi6cHWVOLE9sCbFX+6YL5jxS1rOgBgS0XWdtqC99XIp+zexAoFSxmheQvj/CN9pBEO7" "TaN5ze6pOGtrQ2b1YQ0wH56KBLkc44q0wfwHxZwPiHzWnjJOUWQdveUVuy4VqB+7ganSN9alZu2MN1GE5i8yxWUqjO/w9gqUW75QoACqJAd50asQ53WIlXddFzao7eLW1r27uK8QIDAQAB" ) ; ----- DKIM key 201903 for example.com


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