I voted to close this question as off topic: Free mailing list provider for open source projects?
Looking at the votes, it looks like we've a hung jury, so I'll take it to meta.
I gave this as my reason to vote to close:
I don't see how a request for free (as in beer) stuff is going to be on-topic here no matter how serious and noble the cause, including a "serious effort for developing open source software" . What makes a free mailing list for open source different from a free mailing list for trainspotters?
To which the OP replied:
"Open source" is a movement, a community & development style which promotes access not just to the source code but also it's development process. "Open source software" is the product of those communities. A mailing list can be used for many purposes, including open source development. Since it can be so critical to the proceedings of open source, assuming it is the preferred method of discussion, it's worth covering available mediums in this exchange.
I am not prepared to go along with that. A free mailing is a free mailing list. Using it for "open source" does not make it different from any other free mailing list.
If we let requests for providers of free mailing list be on topic, what about this one?
Provider of free beer for open source projects?
"Open source" is a movement, a community & development style which promotes access not just to the source code but also it's development process. "Open source software" is the product of those communities. For open source developers coming together in a convivial setting where beer and other beverages are consumed is sometimes essential for the team to get to know each other. Since beer can be so critical to the proceedings of open source development, assuming sharing beers is the preferred method of team-building, it's worth covering available providers of free beer in this exchange.
Only joking ...
I can certainly see requests for mailing lists providers (gratis or not) being on topic, if the questions requested a mailing list that fulfilled more requirements than being "gratis", such as:
- supports GIT's email integration for patches and pull requests;
- is integrated with an ticket tracking database;
- provides facilities for segmented mailings to diverse project subgroups;
... you get the idea.
But just being "gratis" and "going to be used for open source development" is IMHO a too weekly related to open source to be considered on topic.