Remove "...@mailer1.zohocrm.com..." when sending mass email

Remove "...@mailer1.zohocrm.com..." when sending mass email

Hi,

Up until recently when i sent a mass email from zoho crm only my name appeared in the from field.
However now, without changing anything, before my name a long string appears: " ...@mailer1.zohocrm.com...".
How can I revert this?

Thx.