Hello Client,
I understand the urgency of resolving the "554 5.7.1: Helo command rejected: ACCESS DENIED" error you're facing with Exim. This issue often arises when mail servers use dynamic IP addresses for sending emails, which is flagged by some receiving mail servers for security reasons.
✔ I have extensive experience with Exim mail servers and have worked on similar issues where mail server configurations need to be optimized for reliable delivery.
✔ My approach would be to adjust your Exim configuration, set up proper DNS records (like SPF, DKIM, and DMARC), and implement static IP configurations to prevent such errors from occurring in the future.
✔ I'll also ensure your mail server is secure and has the best configuration to avoid being blacklisted or flagged by spam filters.
I am confident that I can resolve this issue and ensure smooth, reliable email delivery. I’m available at any time zone and ready to work on fixing the issue immediately.
Thank you for considering me.
Best wishes.