What is a 550 error in Outlook email?
A “550 Authentication is required for relay” error indicates that your email server requires SMTP authentication in order to send outgoing mail, but the email client used to send email has not been authenticated with your username and password. Fortunately, resolving this error can be done quickly and easily.
How do you fix 550 this message was classified as spam and may not be delivered?
Common Fixes for the Error: This is most commonly caused by not having SMTP Authentication set in the Outlook. Check out our article on Invalid HELO Names for instructions on setting that correctly. You should then be able to send normal emails properly via Outlook.
How do I fix Error 550 in Outlook?
How do I fix a 550 error?
- Check for email address typos.
- Check whether the email IP is blacklisted.
- Try sending the email after some time.
- Try changing your outgoing mail port.
- Check whether IP filtering is enabled.
- Enable SMTP authentication.
- Troubleshoot the SSL method.
- Contact your ISP.
What does 550 too many invalid recipients mean?
The error, which is displayed as Error 550 Too many invalid recipients occurs when you attempt to send a message to multiple users or email addresses, that are no longer valid, from Outlook, and eventually, the message doesn’t get to the intended recipients.
What is Error 550 relay not permitted?
550 error number can mean various non delivery situations which are usually explained by the additional information. In your case the additional information was ‘relay not permitted’, so this means the email did not get through your outgoing server for some reason.
Is not permitted to relay 550 through this server without authentication?
1.1) or Server error: 550 relay not permitted, authentication required / Relay not allowed The most common cause is that authentication is missing in the outgoing mail settings. With outgoing mail, your e-mail address / login and corresponding password are also required.
How do I send an email to more than 500 recipients?
You’ll need to send two messages for more than 500 recipients (which I hope are in the BCC field). There is no way around it. Also note that putting that many addresses in the message, even in the BCC field is more likely to be identified as spam.
What is the maximum number of recipients in Outlook 2016?
500 recipients
How many e-mail addresses can I put in Outlook’s and OWA’s To, CC & BCC fields?
| Feature | Limit |
|---|---|
| Recipient limit | 500 recipients |
| Recipient rate limit | 10,000 recipients per day |
| Message rate limit (SMTP client submission only) | 30 messages per minute |
What is 550 relay not permitted?
When a user receives a 550 relay not permitted error, it means they are not permitted to send an email via the server that they are attempting to send an email from. When users send an email from their Internet Service Providers (ISP) mail servers, they generally do not have to authenticate themselves.