Amazon SES

Amazon Simple Email Service (SES) is Amazon’s email sending service.
Weight charge system, no minimum fee required.
Free quota is 62,000 transmissions / month from EC2 and 1,000 receptions / month.

Amazon SES Sandbox
– In order to prevent fraud and to avoid SPAM accreditation from ISPs, new user accounts are placed in a sandbox (environment for verification purposes) and limited in part by behavior.
– Emails can be sent and received only from verified email addresses or verified domains.
– You can send up to 200 messages per day, up to one message per second.
– If you move the account out out of the sandbox, it will work in the unrestricted environment.
– It will take 1 business day to proceed.

Identity
– Case- insensitive combination of domain and email address. (user@example.com and USER@example.com have different identities)

Domain Key Identification Mail(DKIM)
– It is a standard for the ISP to prove that senders have signed e-mail messages so that they are genuine and have not been tampered with by a third party during transmission.