apache port 80 problem, mass mailings

[MarcosB]

Good afternoon.

* if I send a few emails, sends fine.

if I send many mails at once, fails

Do not know what else to do, please help.

my mail server is Postfix

Thank you, excuse my English, is google translator

 

[IgorG]

Try to find a reason in Plesk maillog /usr/local/psa/var/log/maillog