Several communities which function online use the mailing list as the primary source of communication and coordination. Ideally, the Wiki talk/coordination pages could/should be used for such activities but the downside is that a person has to be subscribed to individual page updates to be able to know that some discrete activity has happened and this is feasible for only expert wiki contributors and I am not sure if we are yet at that ideal level of expertise.
Isn't English Wikipedia the most sophisticated and evolved one? Hint: Watch list.
If someone is not actively following a project, then how is he fit to coordinate it?
Further, Wikipedia works on the community model and as you have
acknowledged most wikipedians on this list are not averse to such mails. There is also a delete option in our email clients which allow us to delete mails which we do not want to read. I hope you can appreciate this and take a decision which is best suited for your interests.
I wouldn't have brought up this conversation if this was just a spam issue. I simply felt that coordinating an on-wiki task through mailing list is not a best practice.