i have a centos box (vps) with sendmail and i'am using it to send a newsletter to mail clients. I'am using a machine in my local network to send the e-mails via SMTP (AUTH PLAIN) but after sending some e-mail (35 .. 50) the connection starts to get closed by the server (centos/sendmail) I've searched google for a limit configuration on number of e-mails in sendmail but didn't find anything. any ideias on what configuration can i use to allow me to send more e-mails?