Email Sent from Gibbon marked suspicious

Respected Team Gibbon,
When ever any email is sent from Gibbon or CLI Scripts it is marked as suspicious as
Be careful with this message
Gmail could not verify that it actually came from ************* Avoid clicking links, downloading attachments, or replying with personal information.

Report spam Looks safe

Can you help me fix this.

Best Regards,

Hi Ghulam, I believe you should be able to solve this by using an SMTP server, under Admin > System Admin > Third Party Settings. This allows you to authenticate to an SMTP server, which then decreases the change of mail being flagged as suspicious. Let us know if this helps. Thanks, Ross.