This happens because your PHP install lacks the iconv() function, most likely because PHP has been compiled without...
This error happens when you try to upload a larger file than your PHP configuration allows.
This error is shown because MailWizz does not have a delivery server to pick to send the current campaign.
Usually we get a certain percent of support tickets related to sending issues
If you know the login credentials are fine but you still get this error, then you should do as follow.
Seems that bounces aren’t processed, what can I do?
In case this kind of error isn’t pretty self explanatory, your php instance doesn’t contain the imap extension