How do I stop Gmail from stripping the values out of URLs?

Question

I recently learned that webmail clients like Gmail will do alterations on HTML emails, for example adding target=\"_blank\" to tags.

Answer 1

Another non-perfect answer here but, my problem was that I was including an http url in the html body and apparently is not valid so I changed them to https. This was on a dev environment so no problem on production.

Here is more info about this:

Any URL's in the body of the mail which lead to insecure sites may also need to be removed. Use https://transparencyreport.google.com/safe-browsing/search to validate these links.. All links should be correctly prefixed with "https". https://en.wikipedia.org/wiki/HTTPS Google seem to be rejecting "http". Sometimes, but not always, removing links from any signature can help.