Hello
Since the time my SSL got expired in October, my emails are not getting delievered from my gmail client. Outgoing smtp connections are failing.
Could be please check if the ssl renewal that you guys did was properly applied to all sub domains. Specially the one in the email DNS entry.
I can give an example of sub domain below which still gives certificate expired error.
https://api.tips4fantasysports.com/
Thanks
Rakesh