Could someone tell me why the bogus email address jkhjkhjkhk@nnnmkm.com is being soft bounced instead of hard bounced? The domain with the nnnmkm identifier does not exist, so this message should have been hard bounced.
Have you looked at the soft bounce reason? That might shed some light.
A
Anonymous
July 29, 2014
Message is: 554 5.4.5 [internal] Delivery not attempted (message expired)
Not sure why that’s considered a soft bounce. If this means that Marketo knows this is a fake address, why would it label it as a soft bounce instead of a hard bounce? And it seems like Marketo ought to mark these as Undeliverable if it knows the address doesn’t exist.
That's a good question. It might be Marketo trying to prevent sending to bad emails, but they also don't want to outright unsubscribe/suspend leads when they technically haven't hit the criteria for doing so.
Hopefully a Marketo rep will see this thread, but otherwise you might want to shoot support a message.