Message in logs

Comments

Amazon SES has suppressed sending to this address because it has a recent history of bouncing as an invalid address

AWS doesn't send emails to this address because it has a history of bounced emails

smtp; 511 sorry, no mailbox here by that name (#5.1.1 - chkuser)

Invalid address

smtp; 550 4.4.7 Message expired: unable to deliver in 840 minutes

Invalid address

smtp; 550 5.1.1 

Everything that starts with "smtp; 550 5.1.1" means wrong address

smtp; 550 5.4.1 Recipient address rejected: Access denied. 

Recipient does not accept emails from our domain. So the issue is on their side

smtp; 550 5.4.4 Invalid domain

Invalid address. Particularly domain part of it

smtp; 550 5.5.0 Requested action not taken: mailbox unavailable

Invalid address

smtp; 550 5.7.1 Service refuse. Veuillez essayer plus tard. service refused, please try later.

Issues with recipient's email provider

smtp; 550 Address unknown

Invalid address

smtp; 550 Invalid Recipient

Invalid address

smtp; 550 RCPT TO:<some_email_address> User unknown

Invalid address

smtp; 550 Requested action not taken: mailbox unavailable

Invalid address

smtp; 550 spam detected

The email was marked as spam by recipient's mail provider

smtp; 550-5.2.1 The email account that you tried to reach is disabled

Address is disabled

smtp; 552 1 Requested mail action aborted, mailbox not found

Invalid address

smtp; 552 5.2.2 Over quota

Recipient's mailbox is full

smtp; 553 5.1.2 Unknown mail server. Could not find a mail server for [some domain]

Invalid address. Particularly domain part of it

smtp; 554 30 Sorry, your message to [some_email_address] cannot be delivered. This mailbox is disabled

Address is disabled

smtp; 554 5.7.1

Everything that starts with "smtp; 554 5.7.1" means that the email was blocked as spam

smtp; 558 5.7.1 

Everything that starts with "smtp; 558 5.7.1" means that the email was blocked as spam

smtp;550 5.1.10 RESOLVER.ADR.RecipientNotFound

Invalid address

smtp;550 5.5.0 Requested action not taken: mailbox unavailable.

Invalid address

smtp;550 5.7.193 UnifiedGroupAgent; Delivery failed because the sender isn't a group member or external senders aren't permitted to send to this group.

Recipient does not accept emails from outside of their system

smtp;554 5.2.2 mailbox full; STOREDRV.Deliver.Exception:QuotaExceeded

Recipient's mailbox is full

smtp;554 5.4.14 Hop count exceeded - possible mail loop

Looks like some kind of error on recipient's side