Get website support form to send email to client's google-workspace info @ account managed with Hestia control panel

Background: This problem mysteriously arose about 6-8 weeks ago. We had made no DNS/MX or hosting/control-panel changes to cause it. One of the many google techs that we spoke with said that google implemented some new spam/phishing policies at about the same time the problem began. * Client has a google workspace info @ [login to view URL] account. We followed google's standards in setting all DNS records, including 5 google-specific MX records. * We use Hestia control panel to administer accounts, dns, websites, etc. * We have developed their website using Laravel. * I have implemented phpmailer to send email to the info@ account, also a couple @[login to view URL] accounts. We use phpmailer on many websites. * Within Hestia we set up a no-reply account as the $smtp account using the host, password, port credentials. Email gets delivered perfectly to any @[login to view URL] account but fails to reach the "info @ [login to view URL]" account. If I enable phpmailer debugging it indicates that the message was sent. I also tried using [login to view URL], set up an sendgrid account, got it confirmed, updated the support form to use the sendgrid credentials, still failed. The error is "info @ [login to view URL], unrouteable address". I contact google workspace support. They have been unable to provide a satisfactory solution. They have said that we must change from Local to Remote mail exchange, however as far as I see Hestia control panel does not include that option. It must be determined automatically, I don't know. Access: I have admin access to the control panel and root SSH access to the website/files. Project: Solve the problem of making the contact form work to send email to info @ business.com. Optional task - get command line mail/mailx working. Bidding Requirements: Bid on the project only if you have the required skills which include: * google workspace * experience with Hestia control panel * experience troubleshooting email delivery * optional - experience with Sendgrid * optional - knowledge of phpmailer Don't mention the word "Wordpress" in your bid. That will get you blacklisted. Don't submit a spam/automated bid. Almost all bids received in the first 5 minutes fall into that category. This is not speed-bidding where the first bid wins. I will review the bids and start contacting the most promising after 24 hours. Don't send us a copy/paste copy of your skills or a list of satisfied customers/projects. What we care about is that you the human being have read the project details and in your bid show that you understand the problem and can solve it. Feel free to check my Freelancer reputation. Thank you.