smtp-out01.seaservers.net has no SRV records.
Question and response
Question
dig smtp-out01.seaservers.net. SRV
Answer
The response has no answer records.
Authority
seaservers.net. 300 SOA ns1.hwrn.net. hostmaster.hwrn.net. 2025122208 3600 600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0