This module allows to configure an *Invoice Transmit Method* on each
partner. This module provides by default 3 transmission methods:

- E-mail
- Post
- Customer Portal

You can manually create additionnal transmission methods or other
modules can create additionnal transmission methods (for example, the
module *l10n_fr_chorus_account* creates a specific transmission method
*Chorus Pro*, which is the e-invoicing plateform of the French
administration).

When we select “Post” or “Customer Portal,” the button to send disappears.
To reactivate the send button, you will need to change the transmission 
method to “E-Mail,”.
