Sorry Mark, I 've been too quick !!!
1) Sometimes users are trying to login but the do not receive activation mail so they cannot access the forum .
2) Sometimes when users posts new questions or new answers, I do not get notification via mail ( as admin )
It do not happen always but it happens discontinuously !!
In every case i get a mailer-daemon error like this :
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients was aborted after 0 second(s):
* giulio@masacoustics.com
Reporting-MTA: dns; smtpcmd02.ad.aruba.it [62.149.128.200]
Received-From-MTA: dns; http://www.trattamentoacustico.it [109.74.204.123]
Arrival-Date: Mon, 31 Mar 2014 21:55:33 +0200
Final-recipient: rfc822; giulio@masacoustics.com
Action: failed
Status: 5.1.1
Diagnostic-Code: smtp; 554 5.7.1 Service unavailable; Client host [62.149.158.248] blocked using bl.spamcop.net; Blocked - see http://www.spamcop.net/bl.shtml?62.149.158.248
Last-attempt-Date: Mon, 31 Mar 2014 21:55:33 +0200
any idea ?? Something wrong in notification system ??
Thanx