Hi sorry for the confusion.
We are not asking them for nextcloud support. We already have that ad part of the nextclouds paid service.
As mentioned we intend to use the mailcow email server - and its mail client will be nextcloud. This context was given in case there was any unmentioned configurations that is needed.
Sorry, was it clear we are asking for mailcow self hosted support as it was in the mail cow website - I cannot pay it out of my credit card spending thousands of euro (which is a lot of money to use developing world Filipinos ) without someone responding and confirming all the details.