As a user, I want to be able to modify the frequency of the newsletter's delivery.

[Aurelien-Gindre]

Problem

The user needs to be able to set the frequency at which they want to receive their personalized newsletter.

Solution

By replying to any email from the service, the user can easily modify the frequency of their personalized newsletter with an informal sentence.

Examples should be provided to help the user understand the syntax:

Examples:

"I want to receive my newsletter every Thursday at 10 AM."
"Send me the newsletter on the first Monday of the month."
"I want to read my news with my coffee on Sunday morning."

The service should then confirm the successful operation by sending the user an email with their updated preferences. The phrasing for the delivery frequency will be standardized:

"You will receive your next newsletter on Thursday, October 12th at 10 AM."