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What are the best practices for managing unsuccessful email deliverability?

I just sent out an email campaign and discovered 5 different result types:
- Delivered
- Spam Complaints
- Hard Bounces
- Soft Bounces
- Deferred
The "Spam Complaints" and "Hard Bounces" are straightforward to deal with. They represent a clear threat to the sender score and need to be immediately deleted from the sending list.

Soft Bounces and Deferred items have subtypes. We are trying to determine what to do with each subtype.

So far, we've seen the following:

- Soft Bounce : mailbox full
- Soft Bounce : general bounce : mailbox unavailable
- Soft Bounce : general bounce : over quota
- Soft Bounce : general bounce : delivery failed
- Deferred: general delay

Does anyone have any suggestions on how to manage Soft Bounce and Deferred? We want to have the best score possible.

7 Replies

Jonathan Barronville
2
0
Jonathan Barronville Entrepreneur
Software Engineer at npm, Inc.
Are you using an established service for this? If not, I'd recommend you do so because email deliverability is a difficult problem, so prefer not to try to do it yourself ... use a service like SendGrid.
Gaurav Sharma
2
0
Gaurav Sharma Entrepreneur • Advisor
Startupper
We keep track of the soft bounces. Email addresses are taken off the list after 10 bounces.
Jason Hofsess
0
0
Jason Hofsess Entrepreneur
We went through Mandrill. We looked into SendGrid, but decided not to use them.
Jason Hofsess
0
0
Jason Hofsess Entrepreneur
@ Gaurav - Good solution. Is there a way to automate that?
Gaurav Sharma
0
0
Gaurav Sharma Entrepreneur • Advisor
Startupper
We use AWS SES and have automated it. Mandrill should have an API that you can use to automate it.
Patrick Colmenar
0
0
Patrick Colmenar Entrepreneur
Development Manager at LDProducts
Jason, you might want to check Mandrill. Pretty sure they do some kind of filtering by known soft bounce. I use Mandrill as well. Amazing product. You can message me directly and I can take a quick look at your data. Right now we are using it for transactional data and have an 'Excellent' reputation.
Eric Lai
0
0
Eric Lai Entrepreneur
Product manager / S/W Engineer / Online Commerce
We use Sendgrid, haven't had any problems with them yet (been using it for 2+ years) and they are quick to respond to specific questions related to any failures related to your deliveries.


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