Something to add onto this, is when I switch to Plain text Email the url comes out like
<a href="https://u29262413.ct.sendgrid.net/ls/click?upn=FXPlWU-2Fwffs4dktcfXMeqW2xtUDkC6w-2FK6nK5J67HMbRHOogd-2FPJlsJVzMcY55JFUT7xpbrcn1c-2BM45JBgwxLL9odSN7nwaA3kjpb2pPZVtpNsOPVYLuhIaMrRWO2J0RqK4casG3wmL9afLQ1x-2B2JhC8f12NOePyUuU2cnxnhxA-3D55-I_NVJKz-2BCMfO80S0wEtVGWZ-2B1OeojXZxasuNx21sJKCltEbf0GupRcxVLsfvDFMU6XrWqcsfhlUlQMUa17JunxTtCIPMr0lDeZ2NnJmdWDk85falNu4jecoNY0j5nmG5saMZlPXfrEn6CQ0bFYTnFgbWt6obfCOs3nLvT1TvIXvxcqA42vY9Get3CWjx8RZPm2CEcpKZsieQyQlYbY0jqNHSSeldqBQpEDzh22Pq4LzHE-3D>Click here to view</a><br><br>