I have two Windows computers on which I use Mozilla's Thunderbird to handle my 3 email accounts (Post Office, Outlook and Exchange) and an iPad which uses Apple's own mail handler for the same 3 accounts.
Recently I have started to experience intermittent problems in sending emails from my Post Office account. (error message - Can't connect to Outgoing Server). When the problem arises which may last minutes to hours it affects all my devices BUT only the Post Office email outgoing server, I have absolutely no problem with sending emails from my other accounts.
PO Customer Service says they are not interested in 3rd party email clients but surely the problem is at their end?
Any suggestions to the problem are welcomed as PO don't want to know