Hints for Amazon Simple Email Service (SES):
- avoid a misinterpretation like _amazonses.example.com.example.com in a DNS record name.
- end a DKIM value with a dot to tell that the domain name is complete.
- just close and open in order to successfully verify, or generate / verify again (having the same DKIM values).
- DMARC does work; a dmarc=fail may be caused by SPF or DKIM setup.
- for too many lookups see: https://tools.sparkpost.com/spf/inspector.
- SES works with the SRS authorization technique, which is flexible.
- a file with login details is an option; for me a database table works with an input form.
- the spam score may be a problem (greenlist / whitelist).
- if using ‘forged reply to’, a spam score is raised, mentioning: FREEMAIL_FORGED_REPLYTO.
- maybe keep the sender address and reply address identical not to end up as spam.
SES with the Simple Mail Transfer Protocol (SMTP):
- DNS settings and credentials under SMTP settings.
- firewall CSF must have SMTP_BLOCK disabled for the SMTP proces.
SES in the Software Development Kit (SDK or devkit):
- DNS settings and IAM user credentials.
- PHP manual: The ‘use’ keyword must be declared in the outermost scope of a file (the global scope) or inside namespace declarations. This is because the importing is done at compile time and not at runtime, so it cannot be block scoped.
- working PHP code: Coding for improved SDK Usage