Shorter DKIM record

[shid]

I have multiple websites hosted with siteground and I’m trying to manage the emails with my own mailinabox setup. I have requested the Siteground Support to update the DNS as suggested in the External DNS of my “box” and they have said that they need a shorter DKIM.

I have pointed out that they would have to do this " You may encounter zone file errors when attempting to create a TXT record with a long string. RFC 4408 states a TXT record is allowed to contain multiple strings, and this technique can be used to construct records that would exceed the 255-byte maximum length. You may need to adopt this technique when adding DomainKeys. Use a tool like named-checkzone to validate your zone file." , as suggested by the box, but they insist on me getting shorter DKIM values.

How do I get this?

[v60fan]

Have you tried making it into multiple parts, separated by a space?

default._domainkey 3600 TXT "v=DKIM1; k=rsa; blahadkfjsdlkfjsdlkfj" "asdlfkjsdlfkasjlfsdjf"

[shid]

Ok, I have not done this before and have had bad experience with DNS. If below is the key I have, how do you suggest I should break this…

v=DKIM1; k=rsa; s=email; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvqEpwSWNRQsu9oWPuy93fAsUI7b5q4L6/S9wJSp3tWhe5yVSgk7D2WhbxNMLL3jt1I83oCh1L1OR6svEDjk9Pv7zCegucLK1+NPvfnNSS3qkuq2Pvz8wcc5cTvR7hbNwftuKHj5TXtZNCi+0/cK0wilJfodjAczh661rpLFZaWV1wXq1nJIhcLCthuq1mIO0W7FuFgCmd9eCN2rEinxFOwxWfyfqCA4Fz3CDJAyGqNQ4DE0TktAi6EVXHcCDS1nyU2a7eQkwARnvv6KyBEjepB/oMmNSSQNE7pf7diULYTps/AymGKE9naJUGpjmAI2ytrkpOB1EMRHu1yFSOW

[v60fan]

“v=DKIM1; k=rsa; s=email; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvqEpwSWNRQsu9oWPuy93fAsUI7b5q4L6/S9wJSp3tWhe5yVSgk7D2WhbxNMLL3jt1I83oCh1L1OR6svEDjk9Pv7zCegucLK1+NPvfnNSS3q”
“uq2Pvz8wcc5cTvR7hbNwftuKHj5TXtZNCi+0/cK0wilJfodjAczh661rpLFZaWV1wXq1nJIhcLCthuq1mIO0W7FuFgCmd9eCN2rEinxFOwxWfyfqCA4Fz3CDJAyGqNQ4DE0TktAi6EVXHcCDS1nyU2a7eQkwARnvv6KyBEjepB/oMmNSSQNE7pf7diULYTps/AymGKE9naJUGpjmAI2ytrkpOB1EMRHu1yFSOW”