Pleased to receive your letter.

Hello, Chris and Lourin! I was pleased to receive your letter. I am now at home in Russia. I hope that you are all well. I am pleased to recall our meeting. Sorry for my bad English. Sergey.

Your English is excellent! :)

Instead of 'I am pleased to recall our meeting', a more natural way to say it could be, 'I enjoyed our meeting' or 'I am happy to have met you.' I hope this makes sense! Let me know if you have other questions though; I'll do my best to answer.