1. Last night, I got complaint from my customer said that their server can’t send email to some gov agencies.<\/p>\n
2. Usually if this happen, you should check your mail server blacklist or reputation.<\/p>\n
3. Done check, the server was in good reputation and doesn’t listed on any RBL (You may check at https:\/\/www.senderbase.org\/lookup\/ or https:\/\/mxtoolbox.com\/blacklists.aspx<\/p>\n
4. So why the recipient does not accept our email ? The error code was : 554 5.7.1 (You are not allowed to connect)<\/p>\n
5. From the error code, it’s doesn’t help you to troubleshoot since there are no details why we are not allowed to connect?<\/p>\n
6. I have take several options to mitigate this issue. But this is not confirm that you are always welcome to any mail server.<\/p>\n
7. Enable clamav scan for outgoing mail.<\/p>\n
8. Configure DKIM on local NS. Since i’m using cloudflare, i need to copy the DKIM into cloudflare DNS.<\/p>\n
9. DKIM record has been filled on the clouflare but the error still out there. I got error p= field must be base64 encoded (http:\/\/dkimcore.org\/c\/keycheck)<\/p>\n
10. I just copy and paste the value of TXT DKIM.<\/p>\n
12. I follow step by step how to setup DKIM on cloudflare, but error still there.<\/p>\n
13. Then i looked into the details of the p= value with other domain which is with a good DKIM record. After compared, there are
\n3\u00a0spot look suspicious after query(dig default._domainkey.domain.com TXT). This is the value from cpanel DNS :<\/p>\n
“v=DKIM<\/span><\/strong>1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv+w6CJDDntA3Zwmk0p What do you need to do when paste it into Cloudflare Edit Record: TXT content is like this:<\/p>\n v=DKIM<\/span><\/strong>1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv+w6CJDDntA3Zwmk0pf+5q – Remove quotation mark ” at “v=DKIM1 1. Last night, I got complaint from my customer said that their server can’t send email to some gov agencies. … More DKIM issue on Cpanel Server with Cloudflare DNS \ud83d\ude41<\/span>
\nf+5qCnmTE1NxA1zaVCZCtwWsuzPdbxdBpDb9R7lYB0V0zWzUAr8NGvnRsRJzYEZHRy6Gv5fplky15mJBppsy
\n6anSqU9V\/n8dEUY6kE0BbwTJL0WJqxwlu+CJ8RS1lGl99XacpWl4Dgf0mhDZlv4ViB+hW1Gv9ao\/0aQ+mWN
\nmWzYLYZD” 29mx0OM<\/span><\/strong>+bwepI1vMyW87mU4i0yi2KMrJRnqOG+lGVJp5qd5ooVpfH0VcHb4HI6ho8phlNa7
\np\/s4uG4pNKCXGET5OAr0E+tWE36nAbWIYsUrjTakbc6bBATXnK80tJf7tIf7zxCfIjqPOIZtwNPklQIDAQAB\\;<\/span><\/strong><\/p>\n
\nCnmTE1NxA1zaVCZCtwWsuzPdbxdBpDb9R7lYB0V0zWzUAr8NGvnRsRJzYEZHRy6Gv5fplky15mJBppsy6anSq
\nU9V\/n8dEUY6kE0BbwTJL0WJqxwlu+CJ8RS1lGl99XacpWl4Dgf0mhDZlv4ViB+hW1Gv9ao\/0aQ+mWNmWzY
\nLYZD29mx0OM<\/span><\/strong>+bwepI1vMyW87mU4i0yi2KMrJRnqOG+lGVJp5qd5ooVpfH0VcHb4HI6ho8phlNa7p\/s4uG4p
\nNKCXGET5OAr0E+tWE36nAbWIYsUrjTakbc6bBATXnK80tJf7tIf7zxCfIjqPOIZtwNPklQIDAQAB;<\/span><\/strong><\/p>\n
\n– Remove quotation mark ” at ” 29mx0OM+bwepI1 and should no space.
\n– Remove \\ before ; at the end.<\/p>\n","protected":false},"excerpt":{"rendered":"