Protocol relative urls

Hi.
Any ideas, how to fix this? I understand, that tis is wordpress feature, but maybe there is a possibility to add http: to images?

Please, check in your main config WP options the URL of the site, have it the https://?

yes, there is full url with http.

As I understand, this is standart WP feature – if you’ll look at every WP site source code, you’ll see, that nearly all src fields (including images, scripts and css files, for example) begin only with //. And this is good feature, especially if your site has some sections with http and others with https
But for email this is bad decision – Outlook, for example, after receiving relative url start to look images at the hard drive and here begins the problem… And this problem is not only with outlook as I know

I fully understand, that it is by and large not your problem (btw – nearly all wp mail plugins have the same issue)… but maybe there is a way to fix this? Only thing we need is to add http to all images src in the mail.

How do you configure the protocol-less URLs? Do you use any plugin to do it?

Kind regards,
Carles Reverter.