Hi! Debian 8, ISPConfig 3.1 (and, after update, 3.1.1). In the email domain tab, the DKIM signature is: MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAo71Jy6Xm6pVXvzkxq4fHpUP20+hAigsq7QM/pOmumTpNzau6I6Y4hq0qij6ync6fZSDbF1dZXyeKme38Ga9on+AMF44fMGNJrZErm5NYNwrR3bH6xLpDj9R/p6qYPIMOAeaTQvzGTEe51bBU1iKi0A5mvtuYijuD1aL7U3Tp/PyXpaAlTAwBaz8XGJBFNQsJNUAsWDvpZKa7TS335woO/19awBGLqWN6/NggrpG4I4/PmImS0FSXqqkTp7U7+BMnAVCsVhVdAWHtMiVF0KaIVQNpTnZn2Ms5mDzZfkdxiQy2zJctizmpJPjPsm+IF7/8+Jc94W0poBGgPrJdD5B8+QIDAQAB In the DNS tab, the DKIM signature is truncated: MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAo71Jy6Xm6pVXvzkxq4fHpUP20+hAigsq7QM/pOmumTpNzau6I6Y4hq0qij6ync6fZSDbF1dZXyeKme38Ga9on+AMF44fMGNJrZErm5NYNwrR3bH6xLpDj9R/p6qYPIMOAeaTQvzGTEe51bBU1iKi0A5mvtuYijuD1aL7U3Tp/PyXpaAlTAwBaz8XGJBFNQsJNUA It results in wrong DKIM validation...
Did you create the dns-record by yourself? You can also try ALTER TABLE `dns_rr` CHANGE `data` `data` TEXT NOT NULL DEFAULT ''; in phpmyadmin for the database dbispconfig
Thanks for answer. No, I didn't. The DNS record was created during automated DKIM process of ISPConfig. Effectively, the data field in dns_rr table was VARCHAR limited to 255 characters. Is it the normal behavior? Your command fixed it. Thank you!