Thanks for your reply...I was sending from the photos app (where you used to be able to select multiple photos to email, as is my custom).. From the mail app you have to "insert" individually, isn't that so?
With the latest os update (ios10) no longer can one select more than 5 photos to attach at the same time (by selecting them in the photo app). This was a deficiency up till ios9, when they "fixed" this and one could select 32 (for example) photos to be attached in one big group. Now with ios10 it seems to be not possible again.
Thanks for your prompt reply.
How strange is that!
I cannot.. as soon as I try to attach six, I am not able to... the email option is not there. (For five photos, yes.) And I updated to ios 10.1.
I use Fastmail.. There is a limit on total email size, yes, but it is generous. However, I always send pics of about 100kb.. So one time when I did attach 32 photos under ios9, the size was not huge, and sucessfully sent.. Now, again, even with 100kb for each photo, the maximum number is five photos,,as always before ios 9 arrived. The only thing that has now changed is that I am using ios 10,1. If I use my old iphone 6, which still uses ios9, I can attach more than 5 photos.
Try restarting your iPhone - turn it off and in again.
If that doesn't help:
Remove the email account from your settings, then set it up again. Also make sure you're using the right default email address. If there's an outgoing mail server option in Advanced in the email account's settings, make sure everything is set up correctly.