Advantages of using Salesforce for mass email:
- Able to schedule when email blast should sent out
- Automatically exclude Lead or Contact marked as Email Opt Out
- Automatically exclude Lead or Contact marked Bounced
- Option to store as Activity for Lead or Contact for each message send out
- Merged fields for email content from Salesforce data
Salesforce allow mass email to a maximum of 1,000 external email per day per organization based on Greenwich Mean Time (GMT). The maximum number of external addresses you can include in each mass email depends on your edition, based on filter in List View:
- Professional Edition: maximum 250 emails in a single blast
- Enterprise Edition: maximum 250 emails in a single blast
- Unlimited Edition: maximum 250 emails in a single blast
This mean if you are on Enterprise Edition, and you need to blast 2400 emails, you need to send in 3 days:
- 1st day - 2 email blast: 500 + 500
- 2nd day - 2 email blast: 500 + 500
- 3rd day - 1 email blast: 400
this screenshot taken from Enterprise Edition when the list view return more than 500 recipients.
If your admin enable notification when mass email completed, from Setup | Email Administration | Deliverability, select Notify sender when mass email completes, you will receive email with information of how many email intended to send out, and how many has been send out successfully, but this doesn't tell you how many emails bound.
Question: when using mass email and hitting the borderline of 1000 daily emails, example: 998 email has been sent-out. The next user going to mass email to 30 Leads. Salesforce will tell that the user that he or she only able to mass send email for 2 emails today.
Single emails sent using the Salesforce application don't count toward this limit. There’s no limit on sending individual emails to contacts, leads, person accounts, and users in your organization directly from account, contact, lead, opportunity, case, campaign, or custom object pages.
The single and mass email limits don't take unique addresses into account. For example, if you have firstname.lastname@example.org in your email 10 times, that counts as 10 against the limit.
You can send an unlimited amount of email to your organization’s internal users, which includes portal users.