Resolution Since Parallels Plesk Panel version 8.4 it is possible to limit maximum number of recipients for email message. To prevent your users from sending mass e-mail, do the following:
Everyone can send mail from the server without authorization. I think that relaying is opened on my server. How can I stop it?
Incoming Mail Server (POP3, IMAP, HTTP) The incoming mail server is the server associated with you email address account. There can not be more then one incoming mail server for an email account. In order to access your incoming messages, you need an email client: a program that can retrieve email from an email account, …
We would like Microsoft to remove its SmartScreen spam filtering technology from its Hotmail/Windows Live Mail email services and implement a usable alternative.
Why using GMail for sending mail messages? First of all it’s FREE! Sure most website owners can use their own SMTP server for sending email messages from their website,
Greek Internet ISPs DNS ,POP3 & SMTP full list