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srinu jsrinu j 

What is the difference between Single email messaging and Mass email messaging?

Shrikant BagalShrikant Bagal
Hi srinu j,  

Single email and Mass email options are avaialble both on UI and the Platform options in Salesforce.  

Single email in UI can be used by workflows, alerts and notifications etc, where as mass emails can be used in the UI to send mass emails to contacts and leads using a template.  

Through APEX we can use the same functionality with additional programming and logic.  

See the links below,  

Email Overview: 

https://help.salesforce.com/apex/HTViewHelpDoc?id=email.htm&language=en 

Single email:

http://www.salesforce.com/us/developer/docs/api/Content/sforce_api_calls_sendemail.htm 

http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_forcecom_email_outbound.htm

Mass email: 
https://help.salesforce.com/HTViewHelpDoc?id=email_mass.htm&language=en_US 

https://help.salesforce.com/apex/HTViewHelpDoc?id=email_mass_notes.htm&language=en 

Apex: 
http://wiki.developerforce.com/page/An_Introduction_To_Email_Services_on_Force.com 

Hope its help you!

Regards,
Shrikant

 
Shrikant BagalShrikant Bagal
Mass Emailing

Pros

Is generally faster for the user (you go through a wizard once instead of once per contact.)

Cons

Cannot customize the email template on a per-contact basis
Might not be able to create a filter to select the recipients
Visualforce email templates cannot be used

Individual Emailing

Pros

Can customize the email template before sending if you select a text template
Does not require Extended Mail Merge to be activated
Does not require a filter to select recipient

Cons

Time consuming for a large number of emails
srinu jsrinu j
Thank You. There are helpful to me.
Shrikant BagalShrikant Bagal
Please mark as best answer and marked it as resolved.

Thanks!
Shrikant BagalShrikant Bagal
if its resolved your issue,please mark as best answer so it will help to other who will serve same problem.
​Thanks!