Geeee whiz, this is beginning to drive me out of my mind ....
Here's what we have going on now. I have one cpanel reseller account for all of my domains. One of these domains, due to its complexity as a site, runs in a package all by itself. That domain was assigned to that package. There are apx. half a dozen other domains for which I had to create a separate package. Then I had to assign those domains to that package. The very first domain which was assigned to this package was einfachclicken. However, the actual owner of both packages and all of the domains is the same.
Now then, our roundcube webmail is working just fine all across the board. However, when we try to use our email accounts via Thunderbird, only the emails for the first domain package are working ... as well as all of the emails of the very first domain in the second package. None of the remaining emails of the domains in that second package are working ... via Thunderbird.
Craziest of all, if I do a mailcheck within thunderbird it appears as though all accounts are properly being checked and there are no errors at all. If I write an email via thunderbird from an account that belongs to that second package of domains, the mail is sent off successfully ... but nobody receives them. This is just nuts as nuts can be. I even cleared my thunderbird cache to see if that would improve things, which it didn't.
Is it possible that I have to assign
each domain in cpanel
to its very own package? I can do that, it just don't seem to me as though that would be necessary.
UPDATE: We got everything fixed. Not sure what the exact problem was, but as of this morning everything is working 100% fine! Thanks again for all of your help.