Everything is fine with me; there is no need for you to be concerned.

这里一切都好，不用牵挂。

《新英汉大辞典》

Everything is fine with me here. Maybe it's not possible to post you anything before the new year, so I'm writing to you now.

我这边壹切都好，也许没办法在新年前给你寄点啥过去，所以就给你写信了。

youdao

I hadn't got in touch with you ever since last time you emailed me. Is everything going fine?What are you busy doing there?

自从你上次发过短信后一直未与你联系，不知近来一切可好，在那里都忙些什么？

youdao