Hi, which phrase is more suitable in formal emails?! thank you so much or thanks a lot? and also what about thanks a bunch?! thanks a bundle?!

Hi All I had introduction meeting with a customer's manger, and I prepared a follow up thank you letter: Dear xyz it was a big pleasure to have this fruitiness meeting with you. and in case you needed any support or have any issues you should

Looking Back What achievement during the past year are you most proud of? MY Words Proactively work in monitoring team to providing that maximum level of Availability of global IT resource (Servers & Network Link). User administration

I am a rookie on this site and did not know double-post is forbidden. I edited my content once I had noticed the rule. But sorry I dont know how to change my title, so this title and the content dont quite fit, I apologize for my recklessness.