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

Since I have found quite useful many tips I have read in the forum, I'd like to post a topic I have been dealing with. When I write a letter, sometimes I just have the name of the person, but not the title, I mean, I do not know if I should

Dear Bob, I haven’t been able to contact you in a while, I’ve been quite busy. The war is intense and there are disputes at certain times. I can hear constant machine gun echoes and noises around me without explanation. You can see the sweat