How do I configure the email settings in the software to send invoices/bills from it?

To send E mail from BUSY, You can follow the steps: 
 Step 1: Go to administration and then click on Configuration 
 Step 2: Then click on E mail configuration option 
 Step 3: Choose the email sending option. 
 1. Send Through Microsoft Outlook 
 Step 1: Select Send through Microsoft outlook option if you want to send mails through the settings defined in Microsoft Outlook. 
 Step 2: Save the configuration 
 2. Send Through Outlook Express 
 Step 1:Select Send through Outlook Express option if you want to send mails through the settings defined in Outlook Express. 
 Step 2: Save the configuration 
 3. Send Directly 
 Step 1: Select Send Directly option if you want to send mails directly through the Server Configurations specified in the Email Configuration option itself. 
 Step 2: Select the Report type to be send through mail 
 Step 3: Mention the SMTP server in server configuration 
 Step 4: Then mention the mail id in user name field 
 Step 5: Then create the Password for BUSY from mail and mention in password field 
 Step 6: Define the sender information with From and reply to mail id 
 Step 7: Click on test account setting to check the outgoing server information is correct or not. 
 Step 8 : Save the configuration 
 SMTP server 
 Emails Port 
 Gmail : Smtp.gmail.com 465/587 
 Outlook : Smtp.live.com 587 
 Yahoo : Smtp.mail.yahoo.com 465 
 Hotmail : smtp.office365.com 587 
 Zoho Mail : smtp.zoho.com 465 
 Rediffmail : smtp.rediffmail.com 25