ftp.testokbuilder.okhosting.com has no SRV records.
Question and response
Question
dig testokbuilder.okhosting.com. SRV
Answer
The response has no answer records.
Authority
testokbuilder.okhosting.com. 60 SOA testokbuilder.okhosting.com. soporte\@okhosting.com.testokbuilder.okhosting.com. 0 60 60 60 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0