Hi there, @Moshele.

I agree with what @4Gal stated about IIF doesn't support bulk email later invoices. You need to use a third-party app to import and link transactions.

In the meantime, I recommend submitting direct feedback to our Product Development Team. They might add this to our future product updates.

For guidance in checking the format of your file, download the sample IIF File in this article: IIF Overview: import kit, sample files, and headers.

If you have additional questions about IIF and managing emails to your transactions, click the Reply button below. I'll be willing to lend a hand. Keep safe always