Email Re-Direct stoped working

In the last few weeks the club email forwarding is returning errors.  We can't send messages to members@.... officers@, even president,vpe,vpm.
The members get the email message when we send out the agenda, the VPM gets a message when someone request information about the club.

Is there something I can do as the admin? 
Is there a general reset that can be applied?
Is there a setting that may have or needs to be set?

One of the returned error messages....
The recipient server did not accept our requests to connect. For more information, go to support.google.com/mail/answer/7720 [mail.renaissancetm.org. 35.215.179.149: timed out]

Thanks
Rich

We need your club number to investigate.

Do you have a custom website domain?  If so, please check that your DNS settings are correct - documentation is provided here:
support.toastmastersclubs.org/doc/item/dns-settings-overview
 

Club number: 885186

Also checked out one of the sites suggested to verify that the club URL is pointing to the proper IP address. Tried this with and without www. and with mail. prefix all pointed what I think is the proper IP address.

www.fortmilltoastmasters.org@ns30.domaincontrol.com.:
www.fortmilltoastmasters.org . 3600 IN CNAME fortmilltoastmasters.org.
fortmilltoastmasters.org. 3600 IN A 50.19.253.65
fortmilltoastmasters.org. 3600 IN NS ns30.domaincontrol.com.
fortmilltoastmasters.org. 3600 IN NS ns29.domaincontrol.com.

Your MX 10 record looks wrong:
You have:  fortmilltoastmasters.org.    3600    IN    MX    0    mail.renaissancetm.org
Should be: fortmilltoastmasters.org.    3600    IN    MX    10    mail.fortmilltoastmasters.org
 

Thanks for the input.
The question is where do I go to change/fix the DNS entry?

Thanks
Rich Couture,DTM/PDG,
#885186fortmilltoastmasters.org

DNS entries are changed at your registrar, which appears to be GoDaddy. Your club should have a login/password to enable you to do that.