Systemic versus individual email delivery
Due to the large volume of emails sent from our servers Envoke support can help with systemic email delivery issues (for example emails don't arrive to any inbox at a certain email provider) but it's not feasible for us to investigate email delivery errors to individual email addresses.
After you followed the steps described on the inbox delivery troubleshooting page and emails are still not arriving to inboxes consistently, you need to raise the issue with the recipient's email provider or mail server admin. If the mail server admins have questions for Envoke we can work with them to find a solution.
Emails sent vs. emails delivered to inboxes
There is a distinction between emails sent and emails delivered to inboxes. Envoke and other broadcast email platforms can only report on emails sent and if the emails bounced. If there was no bounce then all that's known is that the email was sent but whether it's in an inbox, spam folder or elsewhere is not possible to report on.
What Envoke is doing to maximize inbox delivery
Envoke's sending IP addresses are continually monitored to ensure they are in good standing. This is called reputation management in email jargon. Your emails are sent from warmed up IPs that have been in rotation for years. We use feedback loops, automated bounce management and monitor anomalies in email activity. A redundant infrastructure is in place to mitigate outages. All this happens in the background as we deliver a large number of emails for our customers.
Despite this ongoing delivery management emails going to spam or junk folders are unavoidable. No email provider can guarantee 100% inbox placement. Our goal is minimize this but a surprising number of legitimate emails sent to opt-in lists still end up in spam folders. Major Email Service Providers (ESPs) estimate this number is as high as 20%. This is not an Envoke-specific metric; it applies to emails sent from any bulk email platform.