With over10 years of experience in DNS management and troubleshooting, I can be your go-to expert for resolving your email latency and MX records issues. Having worked extensively with Microsoft Exchange, including the recent O365 migration similar to yours, I am familiar with the intricacies involved in transitioning from an in-house hosted server to a cloud-based service. This understanding will help me quickly identify any discrepancies that could potentially affect email delivery on your system.
Additionally, my proficiency with various mail servers, such as Postfix, EXIM, and hMail will enable me to evaluate the health of your ElasticEmail setup efficiently. Given that you have access to GlockApps but are unsure about its utilization, I can provide comprehensive guidance on how to utilize it effectively for verifying your email deliverability and SMTP services.