For several reasons, I've had to change my password for two of my email accounts. This caused me more trouble that I think there should be.

After a couple of hours, I managed to get  account#1 set up as a send-and-recieve account. Account#2 using the same details as send-only-account#2 comes back with :   "We're sorry, but we are upgrading our system and you cannot add or edit your account. Please try again in a few hours."

Both accounts are 3rd party - have now been deleted in their format pre change of password to set them up as new email accounts - and Account #1 works perfectly. Account #2 continues to give the above message after 3days of attempting to set up a send-receive account (with the same method successfully used on Account#1)

The new password for Account #2 has been verified and correctly entered on each occasion. It was suggested by the host site that repeated attempts to create the account with the new password may have resulted in a perceived hack attempt and that password has now been reset (the same password). Still can't set up new send/receive account - still can't delete send only account - still still the same message.

Both account were working perfectly prior to change of password - just a few suspected hack situations. 

I've been using Firefox for all of my attempts and have not yet tried other browsers.

Is it just that the send only account of the same name needs to be deleted before a new account with the same details can be used - if so how do I do this other than the obvious? is there a trick to it I can't see? , or is it something else?