1000 FAQs, 500 tutorials and explanatory videos. Here, there are only solutions!
Limit to the number of Mailing List subscribers
For information, the Mailing List tool is only available in the old admin console and for users who activated it before June 2, 2015. This tool will no longer evolve and cannot be activated on demand. Thank you for your understanding.
The limit to the number of subscribers that can be added to a Mailing List is 120,000 email addresses per list.
Link to this FAQ: