Bounces from valid email addresses. How do you handle? | Community
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Dory_Viscoglio
Dory_Viscoglio
Level 10
March 9, 2016
Question

Bounces from valid email addresses. How do you handle?

  • March 9, 2016
  • 3 replies
  • 7322 views

There are email addresses in our database that we know are valid emails because our teams are communicating with them regularly, but emails to them from Marketo bounce regularly and repeatedly, causing them to be suspended  by our bounce policy. How is everyone else dealing with these? Or is this a problem that most other people don't have? Also, for reference, we have a Marketo Dedicated IP so that (in theory) shouldn't be related to our issues.

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    3 replies

    Dan_Stevens_
    Dan_Stevens_
    Level 10
    March 9, 2016

    Some of these happen within our ABM accounts - which are our most strategic accounts.  What we've found is these companies are blocking ALL emails sent from Marketo - so having them whitelist emails sent from us isn't a solution.  We then tried another approach (as suggested by Marketo's deliverability team) - by having the account whitelist a regex version of the Return Path header (e.g., "xxx-xxx-xxx.(\d+.)*\d+@em-sj-77.mktomail.com" - where "xxx-xxx-xxx" is our Munchkin account ID).  We had one account that agreed to work with their IT department to implement - but that didn't even work.  I wish there was a simple answer here - especially as we're finding more and more of our key accounts block our (Marketo) emails.

      Kiersti_Esparz1
      Kiersti_Esparz1
      Level 4
      March 9, 2016

      Dory,

      I manage the Email Deliverability Team.  I would be curious to know why the addresses our bouncing in our system.  Does the bounce we receive indicate an invalid address or some other kind of delivery issue?  I would look to see if there was a delivery issue that could be resolved like blocking related to spam filtering. 

      I would recommend reaching out to Marketo Support with the list of addresses you are concerned about.  A review of the bounce reasons would give us direction on how to troubleshoot this concern.

      I have seen a few Community Blog posts on Troubleshooting high bounces and I found this one very helpful.  Monitoring Email Deliverability: Troubleshooting High Bounce Rates – Part III

      The author links to other blogs in this series that you might find interesting as well.

      Monitoring Email Deliverability: Bounces - Part I

      Monitoring Email Deliverability: Unengaged Users – Part II

      Monitoring Email Deliverability: Troubleshooting Spam Blocks – Part IV

      Thank you,

      Kiersti

      Kiersti Esparza

      Manager, Privacy & Deliverability Team, Marketo, Inc.

      Kiersti Esparza
      Dory_Viscoglio
      Dory_ViscoglioAuthor
      Level 10
      March 10, 2016

      Hi Kiersti, thanks for the response. I will have to take another look, but we get a lot of soft bounces. Some of the reasons include:

      • 550 [internal] [oob] The recipient is invalid.
      • 550 5.1.1 User unknown

      But these are people who we are regularly in contact with through our corporate email.

      I've even seen people who are marked as delivered, soft bounced, and then opened (of the same email). 

      Our bounce policy is set up as the following:

      1. 2 hard or 4 soft bounces in the past 30 days, suspend for a week then unsuspend
      2. 4 hard or 8 soft bounces in the past 30 days, suspend for a week then unsuspend
      3. 6 hard or 12 soft bounces in the past 30 days, permanently suspend

      Our teams are especially concerned because we have several newsletters and many people subscribe to multiple newsletters, so it's possible for a person to hit 4 soft bounces in a single day if their emails start bouncing.

      I will have to start watching these much more closely, and I will open a support ticket regarding the bounces to see if there are any recommendations that Marketo has.

      Dan_Stevens_
      Dan_Stevens_
      Level 10
      March 10, 2016

      We see this one quite often: 550 [internal] [oob] The recipient is invalid.  I often chalked it up to mean the email server initially accepted delivery – probably into some sort of spam catcher (marking the email as “delivered”); and then bounced back the specific code (“550 [internal] [oob] The recipient is invalid”), letting Marketo know that this is an invalid email address.

      We're finding more and more false positives in our email sends - especially from a delivered, open and click perspective, where one or all of this activity includes some sort of bounce notification at about the same time the positive activity takes place.

      Our bounce policy is much less forgiving than this - especially on the hard bounce side.

      Josh_Hill13
      Josh_Hill13
      Level 10
      March 9, 2016

      Dory, there's an old post on this from Steven Moody. Basically, pull the bounced list, look at the reason codes and then decide to set it free again if it is really valid.

      Are you sending from the same domain as corporate, sub domain? Another one? Is your IP getting flagged vs. the corporate server?

      You could also exclude known good leads from the suspension.

        Dory_Viscoglio
        Dory_ViscoglioAuthor
        Level 10
        March 10, 2016

        Josh, if we exclude known good leads from suspension, won't this have an overall impact on our send reputation since we will continue to send to them? Or should it not impact things?

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