Hi there, 

Our domain was expired, it's been 3 days after renewing domain but I'm still unable to send emails. Emails are coming in with no problem. 

MX records are pointing to zoho. MX checker link below 
https://mxtoolbox.com/SuperTool.aspx?action=mx%3atomo.ge&run=toolpage

Any ideas how to solve this?
Thanks for your help!