Sending email to multiple recipients

Published: 25 August 2016

If you need to send e-mail to multiple recipients, there are certain rules that you should consider.


  1. Staff user account at LTU
  2. Active email account


  1. The maximum number of recipients for an email is 300.
  2. You must then wait 900 seconds (3*300) before you can send to another 300 recipients.
  3. If you exceed the limit of 300 recipients, you will be blocked from sending further emails for 24 hours. You can however still receive mail during this time.
  4. If you want to send email to more than 300 recipients in a mail, you must contact the IT Servicedesk first.

The reason for this limit is that many university accounts have been hijacked via phishing mails and there is a risk of LTU being blacklisted on the Internet.