Make sure that you have selected a customer. Select "Project" -> "Determine" to search for a customer. You should then click on "File" -> "Send email" can send an email.
Make sure that you have installed the SSL patch.
Make sure that reception for POP3/IMAP is activated in your account. By default, Web.de prohibits the retrieval of emails via POP3/IMAP. To do this, log in to your Web.de account via the Web.de homepage. Then click on "Inbox" -> "Settings" -> "POP3/IMAP retrieval" -> "Sending and receiving emails via an external programme (Outlook, Thunderbird)" (as at 07/01/2016).
By default, Web.de only retrieves the "Friends and acquaintances" folder via POP. Either add the sender address to the Web.de address book, or select "Inbox" -> "Folder overview" -> Move the mouse over the "Unknown" folder, click on the spanner that appears on the right and tick the box "Retrieve emails in this folder via POP3", then the emails will also be retrieved via POP (as of 07.01.2016).
Direct mail reception has been set in Mail.ini to "No" button. In the Mail.ini the value behind B_Direct = Yes and restart the GP Manager.
Make sure that you have updated the mail module and that no firewall is preventing the GP Manager from sending.
If a customer is selected who has too much measurement data, the data cannot be sent as an email. In this case, you must transfer the customer by saving the data as a GPF file.
First select the customer via "Project" -> "Determine" and then save the customer via "File" -> "Save as ..." save the customer on a USB stick, for example.
To import the customer, you can import the customer via "File" -> "Open" back into the GP Manager.
Deleted emails are temporarily stored in the recycle bin. These emails can be deleted by clicking on "Empty wastepaper basket ..." be permanently deleted.
If an email is selected, it can be deleted by clicking on "Delete" can be moved to the recycle bin.
With a click on "Tidy up" all emails that have already been entered are moved to the recycle bin.