Leveraging my extensive 6+ years in the industry, I am confident in tackling your PHP7.4 to PHP8.1 code upgrade project, plus its email functionalities, head on. My broad programming language proficiency spans PHP, Laravel, CodeIgniter, SaaS, Single Page Web Application structures (along with MySQL, HTML5, Css3, AJAX, JavaScript, SQL, XML API Integration).
My strategic approach will ensure uninterrupted functionality of all email operations post-upgrade too. Having undertaken previous version upgrade projects successfully and fine-tuned performance effectively, I’m familiar with what it takes to deliver exceptional service while remaining time-bound and on-budget.
In conclusion, entrusting this project to me would ensure seamless code transition, optimized email functionalities and robust system performance. Let's engage in a detailed chat about your expectations so we can move forward harmoniously towards delivering an impressive solution that aligns perfectly with your needs!