Form email notifications not arriving

Site: 4ksmartqatar.com
Form name: quote-request

Form submissions are landing correctly in the Forms dashboard as verified, but the configured email notifications are not arriving - not in inbox, not in spam. This has happened with two different notification email addresses: sales@al-qatar.com and 4ksmartgroup@gmail.com.

Could you please check if either address, or my site, is on your suppression/bounce list, and clear it if so?