Not for this use case or crawling. They won't even hit robots. I've caught google, discord, valve, slack doing this on my hobby sites over the years, likely checking to see if the target URL contains obvious malware. In my case the solutions were simple. Add simple auth and/or block IP ranges associated with their AS number. Obviously this isn't the solution for companies, though you could have a unique domain specifically for email URL's and decide what limitations to put in place. Blocking them can flag your site as "malicious" and I am perfectly ok with google saying my domains are malicious.