hello team

please if you can help
I send several emails me with my team
subject line is: X-RFC
X is variable is worth 1,2,3, ....
my goal is every email sent contains an -RFC subject
its object is stored in an excel file for each person of the group knows the nemero of X to increment it

for example if I find in 1-RFC object file
I will send email with subject 2-RFC
note the emails are sent by outlook
thank you in advance
Best regards