If your emails are sent repeated, it means that you cron is not working fine. The emails from database should be cleared automatically, if your cron is running.

If not, then there is some other problem with your site cron. The plugin just hooks to the Oxwall email queue and does not send message by itself.

PS: You can disable the email notification from the admin settings too.

Ok i will check my cron configuration but i want to let know that from classic massif send mail i don't have that problem. the problem just start after sending mail from the plugin. but generaly the idea of plugin is good and it's what i need and if we can give privilege that: a user from a group can see only to his group a massif message or additionnally added group added to him that will be ok too.

Can you confirm if your cron runs good?

How can i test it to give you the layout here to be sure that every thing is ok with the cron?

http://www.MySiteWeb/ow_cron/run.php i have a blank page and the cron configuration is
which php
/usr/local/bin/php

which wget
/usr/bin/wget

I have test those 2 configurations

/usr/bin/wget -q -O /dev/null http://www.MySiteWeb/ow_cron/run.php

wget -q -O /dev/null http://www.MySiteWeb/ow_cron/run.php

Then it looks good for cron.

I thing that the problem is when u attach a file.

I could not understand.. sorry

Sorry for my english i'm a french speaker. I thing that problem is not with the plugin, but with the number of character when u send massive mail. From 900 words the problem start.

D'accord. Vous pensez que le nombre de mots est le problem?

oohh c est mieux ainsi :).
Je pense qu'il y a un probleme du nombre de characteres dans le message. Des que j'envoye un message audela de 900 characteres j'ai apres le meme message qui est envoye en boucle chaque 5 minutes environ. Depuis la derniere fois j ai desinstalle le plugin  Mesageplus, j ai envoye un mail via mass mailing le meme phenome se reproduit, pour un debut j ai supprime les messages de la table OW_base_mail pour resoudre temporaire le probleme. Pour les cours messages tout fonctionne a merveille. Je ne sais si d'autres personnes ont rencontre un problème similaire.