Floodgate sends emails via SMTP.
You can review the smtp details used in Campaign Settings > "NAME" (edit icon) > Email > Email Configuration
You will need the following information
Save your changes and send a test email using Email > Send Test.
What is SMTP?
SMTP stands for “Simple Mail Transfer Protocol” which is the standard technology we use when sending email. Although other technologies have been developed, this simple, text-based protocol still remains the norm.
Here’s an example of a communication between a sender and a server when sending an email.
First, the sender (the client) makes a TCP connection on the appropriate host port. Most of the time we use port 25. Our service is also available on 8025, 587, 80, 465, 8465 and 443.
We can achieve this on most devices by simply entering the following command at a command prompt. Here, we’ll use smtp2go.com as an example server.
telnet smtp2go.com 25
Check out the actual communication below (S: stands for server and C: stands for client)