Bonjour
If you may have two email addresses.
One of mine was stuck with a "attached file".
You also should have someone ashore to manage the adresses and, if necessary, to kill the big message.
The rule is simple no images no attached files but it's so easy to join something by a click!

I would not recommand to use satcom at voice. It is expensive, the sound is poor and it is intrusive in the single handed boat life.
Email is much better.(already intrusive!)
Eric