...
From that point on, the SpamAssassin developers handle things. They may ask you some questions or request a contributor license agreement if the contribution requires it, and hopefully, your new rules will be added to the source code repository for testing, and if they work well, are likely to be included in future released versions.
If your rules don't get added to the default SpamAssassin set, it may be useful to add them to CustomRulesets.
...