== lot of fluctuation regarding e-mail addresses ==
I questioned Brion VIBBER on this issue these days. My opinion is, that for the community it is important to have "nonambiguos communication facilities". If somone wants to spam, he / she can do it anyway. The function "email this user" is available only for visitors logged in. Where is the risc?
As a webmaster of an alumni site http://www.lenauschule.de/ having implemented a similar feature (e-mailing registered colueges) I experienced a lot of fluctuation regarding e-mail addresses. We use "Return-path:" too. Returned e-mails are exchanged manualy if valid alternative e-mail addesses (three in total) are available.
Analysing the reasons for rejected e-mails there are lots of: account full, spam flter rejects, other rejects because company e-mail addresses where provided, user unknown etc.
The feature is implemented at http://lenauschule.de/jahrgang/1975/ . Search Wiewe at the end and click on the e-mail address. You have to reenter the number next to the "chricht senden" button.
Regards Reinhardt [[w:en:User:Gangleri]] http://easy.go.is/gangleri/