Hello,

I'm using Name Credential to do callouts. Starting today, I'm getting an "invalid domain name" exception on domains which do contain an underscore.

For demo purposes I'm going to use a domain which a found while googleling for another domain contaning an underscore "public_docs.crg.es" to verify it has nothing to do with my employers network infrastructure.


Demo code:
HttpRequest req = new HttpRequest();      

req.setEndpoint('callout:demo2');
req.setHeader('Content-Type', 'application/json');
req.setMethod('GET');

Http http = new Http();
HTTPResponse res = http.send(req);
System.debug('res: '+ res);

Name Credential URL:
public_docs.crg.es

Any other domain not containing an underscore works like a charm.

Does anyone have a hint?

As a workaround, we are trying to migrate to non-underscore subdomains and avoid them in the future.