MX shopify problem

MX shopify problem

hello,

i added all MX values in my shopify DNS - it shows those values on the shopify panel + your toolkit.
I tried to send some email and it works, however on my gmail it says they cant verify this email.
When i try to answer into my domain's email - it sends me back this info: 553 Relaying disallowed.
It this normal? Should i wait longer or is there any more specific problem i should know about? 

thank you in advance for your help