Documentation of SES features

Under `Environment settings` there is a SES section.


There is no detail on this in the documentation:

https://docs.aws.amazon.com/res/latest/ug/environment-settings.html

Start with the Environment settings section in the documentation linked in the issue and inspect the existing SES section shown in the image. Identify which SES settings or features are currently undocumented, then update that section so its coverage matches the available environment settings and verify the resulting documentation is complete and clear.

Written by the indexing model from the issue text.