You no longer receive e-mails from Belcofin via your Gmail address?

This is because Google has disabled access to less secure apps. In other words, as of 30 May you will no longer be able to send mails from Belcofin via your Gmail account. 

How can you solve this?

You need to create an app password and enable two-step verification in your Google account.

An app password is a 16-digit access code that allows a less secure app or device to access your Google Account. App passwords can only be used with accounts that have two-step verification enabled.

More information and how to do this correctly can be found via this link: