CNAME DKIM“托管”

Question

I've ran into an issue where one of our domains is hosted with a company that only allows 1024 bit DKIM public keys, however the server that sends out emails has the DKIM public keys set and enforced to 2048 bit.

I'm looking to "host" the 2048 bit DKIM key on a different domain and link it across to the main domain with a CNAME record.

Similar to how Mailchimp does it with their DKIM keys, where by you setup the record:

CNAME k1._domainkey dkim.mcsv.net

For reference if you lookup the DNS records for that mailchimp server the only one available is:

dkim.mcsv.net. 21593 IN TXT "k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUoNyIR4Bn84LVcfZE20rmDeXQblIupNWBqLXM1Q+VieI/eZu/7k9/vOkLSaQQdml4Cv8lb3PcnluMVIhQIDAQAB;"

I'm wanting to copy this setup for a so I can host the DKIM key on something like hosteddkim.mywebsite.com

The server that sends out the emails wanted the DKIM key to look like:

TXT default._domainkey v=DKIM1; k=rsa; p=MIGLONGLONGSTRINGHERE v=DKIM1; k=rsa; p=MIGLONGLONGSTRINGHERE

The domain that I want to host the DKIM key on, I tried to setup like:

TXT default._domainkey.hosteddkim v=DKIM1; k=rsa; p=MIGLONGLONGSTRINGHERE v=DKIM1; k=rsa; p=MIGLONGLONGSTRINGHERE

I then set the following up on the domain where I am limited to a 1024 bit DKIM key:

CNAME default._domainkey hosteddkim.mywebsite.com

However it doesn't detect that the DKIM key for some reason... what am I doing wrong?

Answer 1

您创建的TXT记录是default._domainkey.hosteddkim.mywebsite.com ，因此您需要将CNAME记录指向该主机名，而不是hosteddkim.mywebsite.com 。