Are you running an old version of GoldMine and recently had an error like:
"An error has occurred while establishing a connection to
the server. Please try again later.
If this issue persists, please contact support"
The problem might relate to how your GoldMine system connects for email integration. Recently Microsoft have stepped up the switching off of the IMAP protocol for accessing email mailboxes. This means any application such as GoldMine that relies on connecting via IMAP to your email will soon stop or this may be the case already. This is the case for both Microsoft and Google and no doubt others will follow. The new protocol that should be used to connect is Oauth.
It is most likely due to the IMAP or SMTP protocol being switched off by your email provider. So, upgrade to the latest version of GoldMine that supports an Oauth connection to collect and send emails.
Here is the notification from Microsoft.
For more information on how to get current with your GoldMine version, contact Wizard Systems