[SOLVED] Isp has shut down mail server

[snowy12]

My Isp has shut down their mail server and nowI keep getting messages about undeliverable mail . I can't notify the senders as I don't know who they are message reads 550 Mail to ????? has been suspended.
These messages are coming through my gmail account how do I stop them?

 

[rgd1101]

filter to the junk folder?
https://support.google.com/mail/answer/6579?hl=en