[simon_vetter]

They most likely forgot to renew their cert on time, which is worrisome from a gov't institution, but not necessarily a sign of evil activity.

I'd try to contact them through other means (i.e. phone, email, etc.) to 1) schedule my appointment out of band and 2) notify them that their certificate has expired.

[namityadav]

I tried that (sent them an email), and got an automatic reply that they delete all emails sent in non-work hours. :)

I'll send them an email again tomorrow.