I'm afraid you'll have to preprocess the mail yourself and replace the google urls with the obfuscated ones, or add them as new links after each instance. This could get tedious if you have many of them, but you should be able to write a perl scri_pt to help.
This is what I do. The code to unpack mime messages, parse each attachment, sanitize and demunge and extract payload urls from js, word and powershell macros, while also removing bayes poisoning text, resolving link shorteners, redacting innocent sites and personal information and coping with all the tricks the spammers and scammers use is truly frightening!
I report hundreds of messages a day mostly automatically for over a decade and still haven't managed to catch all the edge cases and it takes up a significant amount of my time that I probably should be using to find some work that actually pays!
