Configuring, maintaining, and dealing with some complicated edge cases can be time-consuming. Sending emails with Sea Cucumber might be attractive to you if:
You don't want to maintain mail servers.
Your mail server is slow or unreliable, blocking your views from rendering.
You need to send a high volume of email.
You don't want to have to worry about PTR records, Reverse DNS, email whitelist/blacklist services.
You are already deployed on EC2 (In-bound traffic to SES is free from EC2 instances). This is not a big deal either way, but is an additional perk if you happen to be on AWS.
Why Sea Cucumber/SES instead of SMTP?
https://github.com/duointeractive/sea-cucumber
Configuring, maintaining, and dealing with some complicated edge cases can be time-consuming. Sending emails with Sea Cucumber might be attractive to you if: