For example, in Postfix mail server, the below setting enables SMTP authentication. If this is disabled in the configuration file, all the users will receive 554 5.7.1 : Relay access denied.
If you do authenticate properly, you can still end up with this error however. The recipients server can deny the relay, if their spam filters have detected the email as spam, or as coming from a spam source (IE: your server is on a blacklist). If this happens, then their server rejects the email, and you will again get a relay access denied error.
Mac Mail App Icloud Client Host Rejected Access Denied
2016-10-10 14:05:23 1btaGg-0004ei-Mf ** [email protected] R=dkim_lookuphost T=dkim_remote_smtp H=someserver.com [192.168.0.1] X=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=yes: SMTP error from remote mail server after RCPT TO:: 554 5.7.1 : Recipient address rejected: Access denied
Probably 80% of our calls and support tickets regarding email issues in general, not just relay denied errors, are caused by the customer having incorrect settings. If you are certain that your server is working fine, then you should go over the settings with your client to ensure they have everything configured correctly to work with your server.
"The message could not be sent because one of the recipients was rejected by the server. The rejected email address was ''. Subject '', Account: '', Server: '', Protocol: SMTP, Server Response: '553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)', Port: 25, Secure(SSL): No, Server Error: 553, Error Number: 0x800CCC79."
An SMTP Server error (such as number 0x800CCC79) can be caused by an error in the setup in your email client program (Outlook Express or Outlook) for the outgoing (SMTP) mail server. A mistake in the username, password, server address, or server authentication can produce this error message when attempting to send an email. To correct this error, you need to know from your email provider what type of authentication, if any, is required by their mail server. To verify your existing SMTP server settings: Open your email client program (Outlook Express, Outlook, Eudora or Windows Mail) Click "Accounts" in the "Tools" menu Click on your email account then click "Properties" button Click "General" tab Ensure that the "E-mail address" is your valid address for this account Click "Servers" tab Verify your account name is complete and its password is correct for this account Un-check "Log on using Secure Password Authentication" (unless specified otherwise by your email provider) Check or uncheck (as directed by your email provider )"My Server requires authentication". If authentication is required by your provider, click the Settings button. On the "Logon Info" screen, select as specified by your email provider, either
"Use same settings as my incoming mail server"; or "Log on using" and enter the specified Account Name and Password.
Delete messages in the "Outbox" folder and send your email message again.
Note: To setup or verify all your email settings, follow the instructions at Setup and Use Email Service . Fix Common Gmail Pop3 Errors Repeatedly prompted for your username and password or 'invalid credentials' error. Fix: Enable POP in Gmail as follows: Sign in to Gmail. Click the gear icon in the upper right, then select Settings. Click Forwarding and POP/IMAP. Select Enable POP for all mail or Enable POP for mail that arrives from now on. Choose what to do with your messages after your POP client or device receives them. Click Save Changes.
The connection to the server has failed. Account: 'Gmail', Server: 'pop.gmail.com', Protocol: POP3, Port: 110, Secure(SSL): Yes, Socket Error: 10060, Error Number: 0x800CCC0E. Fix: On the "Advanced" tab of your POP email client program (such as Outlook, Windows Live Mail, Outlook Express, or Thunderbird), set "Incoming mail (POP3):" to 995. The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was 'example@gmail.com'. Subject 'example', Account: 'pop.gmail.com', Server: 'smtp.gmail.com', Protocol: SMTP, Server Response: '530 5.5.1 Authentication Required f45sm8616pyh', Port: 25, Secure(SSL): Yes, Server Error: 530, Error Number: 0x800CCC78. Fix: On the Servers tab of your POP email client program, enable My server requires authentication beneath Outgoing Mail Server. Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: 'pop.gmail.com', Server: 'pop.gmail.com', Protocol: POP3, Port: 995, Secure(SSL): No, Error Number: 0x800CCC0F. Fix: On the Advanced tab of your POP email client program, enable This server requires an encrypted connection (SSL) for the POP server. Your SMTP3 server has not responded in 60 seconds. Would you like to wait another 60 seconds for the server to respond? A time-out occurred while communicating with the server. Account: ' pop.gmail.com', Server: 'smtp.gmail.com', Protocol: SMTP, Port: 465, Secure(SSL): No, Error Number: 0x800CCC19. Fix: On the Advanced tab of your POP email client program, enable This server requires an encrypted connection (SSL) for the SMTP server. The host 'smpt.gmail.com' could not be found. Please verify that you have entered the server name correctly. Account: 'pop.gmail.com', Server: 'smpt.gmail.com', Protocol: SMTP, Port: 465, Secure(SSL): Yes, Socket Error: 11001, Error Number: 0x800CCC0D. Fix: On the Servers tab, change smpt.gmail.com to smtp.gmail.com An unknown error has occurred. Account: 'Gmail', Server: 'pop.gmail.com', Protocol: POP3, Port: 995, Secure(SSL): Yes, Error Number: 0x800C0133. Fix: In your POP email client program, click File > Folder > Compress All Folders. Note: To setup or verify all your email settings, follow the instructions at Setup and Use Email Service. 2ff7e9595c
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