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http://myitengineer.com/hmailserver-smtp-protocol-error-550-delivery-is-not-allowed-to-this-address/
May 05, 2016 · SMTP protocol error: 550 Delivery is not allowed to this address. Cause. Sending emails to the HMailServer from a different host is prevented by default as this could result in spamming. Solution. Go to settings => advanced => IP Ranges =>Internet. In the Allow deliveries from section check both. external to local.
https://support.smtp2go.com/hc/en-gb/articles/360015283053-Error-550-that-SMTP-username-s-account-is-not-allowed-to-send
Error: 550 that SMTP username's account is not allowed to send. Also applies to: Error: 550 that IP address is not allowed to send. This email rejection is generated if you have not yet verified your sending domain, or if you've added a domain name that was only recently registered.
https://serverfault.com/questions/837329/smtp-error-550-delivery-not-allowed-to
The created email address is working fine. I mean I can login to the mail server and check the inbox of this user (the moodle). Also, there is a plugin for testing the setting. The log shows that delivery is not allowed and I don't know which side is causing such a problem, either the mail server admin or …
https://portal.smartertools.com/community/a86442/MasterPages/MasterPages/
Reason: Remote host said: 550 Outgoing SMTP is not allowed These errors are occurring for a variety of recipients on different domains so I have to imagine the issue is on our Smartermail server. I just can't figure out what it is!
https://www.hmailserver.com/forum/viewtopic.php?t=3027
Jul 22, 2008 · 550 Delivery is not allowed to this address. Use this forum if you have installed hMailServer and want to ask a question related to a production release of hMailServer. Before posting, please read the troubleshooting guide. A large part of all reported issues …
https://www.crazydomains.com.au/help/550-blocked-error-explained/
SMTP (Simple Mail Transfer Protocol) is a set of standardised rules on sending and receiving emails (electronic mails). Most often, it is used along with POP3 (Post Office Protocol 3) or IMAP (Internet Message Access Protocol) because it has limitations with regards to queueing and receiving messages.
https://bobcares.com/blog/550-email-blocked/
Sep 29, 2018 · The mail system : host smtp.recipient.coml[XXX.211.XXX.31] said: 550 Email blocked by hostkarma.junkemailfilter.com (in reply to RCPT TO command) It means that the recipient’s mail server smtp.recipient.com rejected the mail from mx.sender.com because the spam filter at junkemailfilter.com classified the mail as spam.
https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/non-delivery-reports-in-exchange-online/fix-error-code-550-5-7-1-in-exchange-online
Remote Server returned '<xxxxxxxx> #5.7.1 smtp;550 5.7.1 RESOLVER.RST.AuthRequired; authentication required [Stage: CreateMessage]' To configure the public folder to accept messages from external senders, follow these steps: Open the Exchange admin center (EAC). For more information, see Exchange admin center in Exchange Online.
https://answers.microsoft.com/en-us/outlook_com/forum/oemail-osend/smtp-relay-550-error-help/38e31ea0-c2d5-411f-b55f-8333cfe8366b
Feb 10, 2016 · 550 5.3.4 432 4.3.2 STOREDRV.ClientSubmit; sender thread limit exceeded Note that the weird thing is, the smtp system failed randomly. Sometimes the same email pass thru but sometimes not.
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