Is there a way I can send an email that contains a couple of HTML links via Zoho SMTP using PHP?

Currently, the email goes out to the the recipient and is saved in the Sent folder just fine. However, the HTML links are removed out of the e-mail content.

Sending the same type of emails via the Zoho mail client works fine -- no links are stripped. But that's not an applicable solution for us. We would like to automate outgoing email for notification purposes.

Grateful if you can shed some light. Thanks!

Best regards,

Anuchit