Relay access denied on sending mail Other domain outside of network

Question

Sending mail results in error  Relay access denied    It throws  Relay access denied   whenever I tried to send mail to  other domain  from  outside network    It works just fine for  myown domain  from  outside inside network  and to  other domain  from  inside network    Here is the list of telnet commands   mail from myself mydomain com - 250 2 1 0 Ok rcpt to yourself mydomain com - 250 2 1 5 Ok rcpt to yourself yourdomain com - 554 5 7 1  lt yourself yourdomain com gt   Relay access denied  rcpt to yourself gmail com - 554 5 7 1  lt yourself gmail com gt   Relay access denied  rcpt to yourself yahoo com - 554 5 7 1  lt yourself yahoo com gt   Relay access denied    I followed all the steps described in  Microsoft Support  and make sure that server configured in correct way and it do not reject any mail  I also tried to trace through using couple of blogs like this one   While using MxToolbox also got the same result  Relay access denied    As  Relay access denied  is very common issue   there are lot of blogs documentation are there   I tried to read all  but I think I am looking in wrong place    Does anybody have any suggestion

User · Answer

I m using THUNDERBIRD as MUA and I have same issues  I solved adding the IP address of my home PC on mynetworks parameter on main cf  mynetworks   127 0 0 0 8    ffff 127 0 0 0  104    1  128 MyIpAddress  P S  I don t have a static ip for my home PC so when my ISP change it I ave to adjust every time

User · Answer

If it is giving you relay access denied when you are trying to send an email from outside your network to a domain that your server is not authoritative for then it means your receive connector does not grant you the permissions for sending relaying  Most likely what you need to do is to authenticate to the server to be granted the permissions for relaying but that does depend upon the configuration of your receive connector  In Exchange 2007 2010 2013 you would need to enable ExchangeUsers permission group as well as an authentication mechanism such as Basic authentication   Once you re sure your receive connector is configured make sure your email client is configured for authentication as well for the SMTP server  It depends upon your server setup but normally for Exchange you would configure the username by itself  no need for the domain to appended or prefixed to it   To test things out with authentication via telnet you can go over my post here for directions  https   jefferyland wordpress com 2013 05 28 essential-exchange-troubleshooting-send-email-via-telnet

User · Answer

Configuring  mail- gt SMTPAuth   true  was the solution for me  The reason why is because without authentication the mail server answers with  Relay access denied   Since putting this in my code  all mails work fine

User · Answer

Set your SMTP auth to true if using the PHPmailer class    mail- gt SMTPAuth   true

[smtp] Relay access denied on sending mail, Other domain outside of network

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