UNIX for Dummies Questions & Answers

Dear All ,

I have Linux Red Hat 6.1 server , and still am facing so many problems with spam and spammers .

from netstat i noticed that my server is keep sending smtp packets to same IP ( x.y.z.c ) , i think its mailer demon sending to this IP , how can i stop my server talking with this IP address , i need to drop all packets sent from my server to this ip ?

also another questions please , i have another sun solaris 7 sparc machine .. i have sendmail 8.9.3 , i have about 3000 mail box for my users , suppose i sent mass email to al those 3000 user , and all of them got my email , but i need to delete it from all the 3000 mail boxes one time ! is there a method ?

Thanks alot

Hi,

First you should know what are your server sending the the remote server...
You can block it using an ipfilter, or at the router level...

I recommend you to go mailbox by mailbox and remove the email you want ( with elm -f, for example ). You can create a script to remove the mail from the mailboxes, if you know exactly what content to delete... but be very careful, you will end up corrupting a lot of mailboxes.

And I would suggest you upgrade your version of Sendmail - there were at least two major security concerns with versions lower than 8.12.10. See Sendmail home page