Checking emails sent

After sending the invoice by email how can check whether they actually delivered?

Email function will be extended so it’s automatically sends you a copy of any email sent by you. This is not exactly proof of email being delivered to your customer but it’s probably better than nothing.

You can always email the invoice to yourself and forward it to your customers manually if you prefer more control over the process.

how can you email the invoice to yourself ? is there any chance of selecting e-mail provider?
and can you allow editing the pagesetup of invoices and quotes?
some times just one line goes to another page.
thank s

you can email it yourself by setting your email address in To field. Support for custom SMTP server is coming.