Secret ingredients to quality software


Bounces - Do you know what to do with bounced email?

Last updated by Christian Morford-Waite [SSW] on 26 Feb 2021 01:16 am (3 months ago) See History

Having people report bounce back emails is frustrating and time consuming. The first thing to try when you get a report is to check that your mail server isn’t on a spam blacklist. An easy way to check this is via MX Toolbox.

MXToolbox 1
Enter the domain to check
Figure: Enter the domain to check
MXToolbox 2
Then select Blacklist Check
Figure: Then select "Blacklist Check"
MXToolbox 3
not blacklisted
Figure: Getting a zero is good, so you know that you are not blacklisted… so Step 1 is good Next step check that you have primary and secondary (and even better tertiary) MX records setup and working.
MXToolbox 4
SMTP test
Figure: Seeing at least 2 MX records is good... Run an SMTP Test to test mail servers. So Step 2 is good If success on both steps the error is most likely on the senders side. Send them the an email to check their mail settings.

Dear xxx

As per this rule on bounced emails

  • I have checked Step 1 – it is good
  • I have checked Step 2 – it is good The problem is likely your end

Figure: What to send the person

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