xpro.se

Here is a bash script that you could run to send yourself 5000 emails

Maybe start by 500 😉 ans wee how you coan connect with Thunderbird if you can go fast true all your email
Then I think youre server is okay

Put these line in a script called send-lot-mail.sh

#!/bin/bash

typeset -i nb=0

while [ $nb -lt 5000 ]
do

 echo -n .
 echo  "." | mail -s "test" PutYOurEmail@yoursomainhere.com
 nb=nb+1
 sleep 0.3

done