How to log mails being sent from Salesforce?
 This post helps you learn how to log outgoing e-mails sent from Salesforce.  E-mails can be sent through two ways:    Workflow e- mail alerts.  Mails stent from Apex ( Using single e-mail or Mass e- mail)   Mails sent from Apex can be logged easily by creating a custom object and inserting records into it, whenever an e- mail is sent.   How to log the e- mails sent through workflow rules?   Here comes to the rescue  E-mail services .  With the help of Email services, you can create an email service address and give this address in   Additional Addresses section while configuring the workflow e- mail alert.   You can write the logic for inserting/logging the e- mail into the custom object in the Inbound handler.