Any email subject line suggestion?

[tmtmt]

I am drafting an email about seeking business cooperation but I have no idea about the subject line.
Could you mind to give me some suggestion? I want a very formal one. Thank you so much!!

 

[Rover_KE]

Welcome to the forum.

I suggest 'Seeking business cooperation' as that is the subject of your email.

You could make it more specific by mentioning the nature of your business.

 

[Tdol]

How about simply Possible business cooperation between xxx and yyy​?