в продолжении встречи

[?!]

в продожении нашей встречи высылаю вам письмо

[Аристарх]

following our meeting I am sending the message to you.

[kinsman]

further to our discussion/as per our agreement made in the meeeting Please find (enclosed) herewith my letter - имхо

[d.]

в продолжениЕ

[Nina79]

kinsman
further to our discussion/as per our agreement made AT the meeeting please (no capital P) find (enclosed) herewith my letter

my suggestion
in reference to our meeting, we are sending you the following.

[alk]

правильно по-русски
в продолжение
http://dic.gramota.ru/search.php?word=впродолжение&lop=x

[perpetrator]

as a follow-up to our meeting

[kinsman]

Nina79
completely agree

[Irisha]

as a follow up/to follow up on our meeting...
I refer to our meeting...

IMHO

[gel]

As a follow-up to our meeting...

[Nina79]

in most, if not all, letters coming from our western partners, i see "in reference to our meeting" (date of the meeting is sometimes included)