This article explains why it can happen that some documents and/or notifications are not delivered to the specified recipient.
E-Mail receipt status
eversign is using Mailchimp for transactional e-mails, they distinguish between 5 statuses of e-mail (3 for undeliverable) and also use a rejection list to manage the sheer amount of e-mails requested every day.
Delivered or Spam
- The e-mail got delivered successfully (SMTP has a delivery confirmation) but it isn't visible in the inbox.
- The e-Mail from eversign got reported as spam.
👉 as soon this happens, the e-mail address gets added to the 🏴 rejection list for 365 days and you won't receive anything from eversign.
Bounced or Rejected
- The e-Mail address or server exists/is reachable, but our attempt to send a message got rejected.
👉 as soon this happens, the e-mail address gets added to the 🏴 rejection list for the next 24h and you won't receive anything from eversign.
- The e-mail address or server does not exist/is not reachable
👉 as soon this happens, the e-mail address gets added to the 🏴 rejection list for the next 1-7 days and you won't receive anything from eversign.
- The e-mail address is on the rejection list for 24h because of a 🟡 soft-bounce
- The e-mail address is on the rejection list for 1-7 days because of a 🔴 hard-bounce
🏴 rejection list
While an email address is active on the rejection list, emails to the address will be given a state of rejected and eversign won't try to deliver the emails. This helps prevent sending emails to an email address that is no longer valid, maybe having temporary issues, or doesn't wish to receive emails from you.
After a rejection expires, if an email is sent to the address, eversign will attempt to deliver the message. Subsequent bounces, spam complaints, or unsubscribe attempts result in an address being added to the rejection list for longer periods of time.
Some examples for the duration of blacklisted emails.
Bounce type | Bounce message | Duration |
---|---|---|
🟡 soft-bounce | smtp;550 Mailbox is full / Blocks limit exceeded / Inode limit exceeded | 5 days |
Most common reasons why an E-Mail isn't visible / receipt
Below you can find a brief explanation of the most common cases:
Mimecast
- The sending mail server is subjected to Greylisting.
- These reputation checks can be bypassed with an Auto Allow or Permitted Senders policy. If it's legitimate traffic, amend your Greylisting policy. reputation checks can be bypassed with an Auto Allow or Permitted Senders policy. If it's legitimate traffic, amend your Greylisting policy.
All other Mimecast topics are here.