Hello @Imran Khalid
Could you please, ensure that everything works correctly without our Email builder active ? Also, we garanty the full compatibility with the official email services but it seems that there could be some issues in displaying if the emails are viewed from 3rd-sources. Also, It may be possible that the image format currently being used in your email templates may not be fully compatible with all mail services but we don’t know the format you are using there. For broader compatibility, we recommend referencing the following resource: https://www.caniemail.com/search/?s=webp (for example if you are using the webp format)
Thank you for your attention to this matter. Should you require any assistance with the recommended changes, please do not hesitate to reach out.
Best Regards,
Jack Richardson
The 8Theme Team