Changed domain but still sending emails from previous domain

Changed domain but still sending emails from previous domain

Hi

I am using zoho on wordpress website. I am currently on free trail to see how things work.

I am having a problem. I signed up with a domain and then removed it and add another one. But I am it is still sending email from my old removed domain when I test the function.

For example:

I signed up with domain1.com email test@domain1.com and then removed email and domain and added domain2.com and email test@domain2.com every time I send emails the sender is test@domain1.com not domain2.com!

Can you help me what to do please?

Thanks