I applied for a job a couple weeks ago and I am trying to follow up. The online application platform does not offer that option, I am unable to find email addresses for anyone at this large company. I guessed at the email address for the HR person, and it seems that one may have gone through, but when using the same address formula for the hiring manager (and several variations) it kept bouncing back undeliverable.

I don’t have the fancy version of LinkedIn, so it won’t let me message them. How are you guys following up on applications?