RFC 5321 4.5.2 not fully implemented (double dot in message)

[benjamin-hg]

If a . (dot, period) in your message (e.g. in a domain name of an included link) happens to be the first character of a transmitted line, it must be prefixed with another dot, according to the spec.

But Mailslurper, on the receiving side, does not remove this extra dot, making some links randomly break.

But it's most annoying if you include non-minified css styles in your html, where all the classes start the line with a dot. Completely breaks things and it took me hours to diagnose that the issue is not my application (Keycloak in this case), but my testing tool Mailslurper.