Connect SendBlaster to mySMTP - mySMTP Knowledge Base

This setup will enable you to send newsletters or bulk email campaigns through mySMTP SMTP relay directly from SendBlaster on your desktop.

1

Launch SendBlaster

Open SendBlaster on your computer.
Click on the top tab: Send.
Then click Settings (gear icon or in the left-hand menu).

2

Open SMTP Settings

Go to the SMTP Servers tab.
Click Add new SMTP configuration or Edit current server.

3

Enter mySMTP SMTP Configuration

Fill out the fields with the following settings:

Field	Value
SMTP Server	relay.xx.xxx (from setup email)
SMTP Port	587
Use Authentication	Yes
Username	Your full mySMTP username
Password	Your mySMTP password
Connection Security	STARTTLS or TLS
Sender Email	e.g., you@yourdomain.com
Sender Name	Your business or brand name

Click Save to store your settings.

4

Test the SMTP Connection

From the Send tab, try sending a test email.
If successfully delivered, your SMTP setup is correct.

Additional Tips

✅ Use a domain with SPF, DKIM, and DMARC properly set up.
❌ Do not use free/public domains like Gmail/Yahoo for the sender address.
💡 Use throttling if you’re sending to large lists (e.g., 1 email/sec).