If you have problems with the delivery of your e-mail messages, we recommend running a test on the very useful e-mail testing site Mail-Tester.com.

How to test with mail-tester.com?

1. Go to the URL https://www.mail-tester.com
2. You will see an e-mail address of Mail-Tester.com, copy it
3. Send the e-mail message with the delivery problems (including the whole content and from the same sender address) to this e-mail address of Mail-Tester.com
4. Wait a short time
5. Click on “Then check your score”
6. You will get an evaluation of the sent message as a result. Pay attention to the orange warnings and especially the red error hints. The more of them you correct, the more likely the new delivery will work.