Undeliverable - feedback from Amazon SES
We've just started using Sendy 2 days ago and currently we are using sendy's Double-Opt in to collect our client's subscriber data. It went well until I noticed that 55% of new subscribers was "unconfirmed"... as you can view it here http://d.pr/i/1Ixb. At first we thought it was because of spam but when i check the Feedback/bounce message from Amazon, it says:
Subject: "UNDELIVERABLE: Message-Subject-Name"
"Delivery failed to firstname.lastname@example.org.
An error occurred while trying to deliver this message to the recipient's email
address. We will not try to redeliver this message for you. Please try resending this message, or provide the following diagnostic text to your system administrator."
We've also learnt that the above feedback message is different from another message with a subject "Delivery Status Notification (Failure)"... which I believe was caused by some user's typo or people trying to spam.
- What is the cause of UNDELIVERABLE message above. If there was an error while sending the email, will Sendy try to resend the message?
- Will it affect my Amazon bounce reputation?
By the way, we've implemented the anti-spam guide as suggested http://sendy.co/discussion/161/lots-of-spam-signups-on-double-opt-in-list and when we check some "UNDELIVERABLE" email addresses randomly it really looks like their real email address.. not 100% sure though.