[pmwiki-users] List serv function

[kjettil]

This question may only reflect my ignorance and may or may not be 
relevant to PmWiki, but it's relevant to a PmWiki project I'm working on 
for a rather small not-for-profit organization.
The need:
1 - To maintain, via a web interface (e.g. a PmWiki page), a membership 
list (email  addresses).
2 - To dispatch emails (if possible from within PmWiki), as and when 
needed, to the members of this list.
Could this be done within the framework of PmWiki?
If not, any hints on where I can find suitable PHP tools?
Thanks in advance.
/kjettil