Mail merge send emails

Hi Help!
I’ve done this successfully before but struggling now up against a deadline! I suspect it might be pretty easy but I just can’t find out how to do it…
Two things have changed.
First (and I don’t think this is the problem) I’ve updated to libre office Version: 4.2.6.3, Build ID: 3fd416d4c6db7d3204c17ce57a1d70f6e531ee21
Secondly the password on the google account has been changed…which I am pretty sure is causing the problem…

So I have mail merge emails to send from a Google email account - it is a shared account, not my usual one.
And they won’t go. In the error message it is trying to sent them from the correct email account.
I can’t remember how to change the settings - so change the password .
Think more confusing because I have thunderbird desktop. The google account I want to use is not linked to this but my personal email accounts are. If I try and open send to it is automatically opening thunderbird…
I can’t remember if I had to change this in the past …and the update has changed it back to Thunderbird being the default or something…or if there is a completely different way of setting up emails for the mail merge …

Have tried the help - it isn’t helping …I need the idiot’s guide!

Any ideas?

Hi I’ve worked it out so posting in case anyone else needs a reminder -it was just the password that needed changing and as I suspect easy enough to do if you know where to look.
It is under Tools/Options/LibreOfficeWriter/Mail Merge Email
Then all pretty straight forward …
Hope that helps someone else - and sorry for being stupid…just panicking and couldn’t see it …
Thanks.