Delivery rate suddenly much higher

[Anonymous]

My company recently switched from Constant Contact to Marketo and I've noticed our deliverability rate is somehow much higher now.

With Constant Contact our bounce rate was steady around 20%
With Marketo bounces are around 5% (95% deliverability)

How is that possible?  I had assumed the 20% bounce rate was due to wrong email addresses because our database is not current enough.  Was it something else?  Is Marketo just that much better?

[Anonymous]

We are pretty awesome.

In all seriousness, there are a few factors:

• We make segmentation easier, so you might be sending to more targeted lists
• A lot of folks purge some leads which switching systems, so you may have done that too
• We're focused on deliverability and do things like throttle email sending and work with ISPs for maximum delivery rates
• We have very good email sending reputation, which also has an impact

20% to 5% is a big jump, but hopefully some of the above helps clarify.