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Emails that forward back to us from external SMTP server


Relay access denied error 554How can I install and configure an SMTP server?psad is failing to send emails through mandrill smtp with postfixSMTP mail server with postfix/dovecot does not require authenticationPostfix PostgreSQL Dovecot SASL Authentication Fails Ubuntu 14.04LTS ServerMail Server Postfix + DovecotPostfix 2.11.0, Error Code: Relay access denied 554.5.7.1, Rejects all external in-bound emailsSend mail using SMTP from multiple computers using just an ubuntu server?Not able to send/receive emails outside my Domain from recently configured email-serverPostfix and relay with Gmail: i can't send emails













0















I have a Mail server (FQDN: mail.ours.com) using Postfix and Dovecot, users having email address like user@ours.com. Like many others SMTP server, if user claim that they are from @ours.com, they need to pass sasl or should be in mynetwork parameter according to the restriction setting; so if user do not pass sasl and not having the ip address in mynetwork, they may got some error message like “sender not login”.



The situation is when a user amy@ours.com want to send email to bob@external.com, but Bob do the setting to let his email forward to bob@ours.com. So SMTP server from external.com will interact with ours SMTP server and claim that the sender is from amy@ours.com wanted to send mail to bob@ours.com. After the request, SMTP from external.com will receive the error message from ours SMTP server said that “(amy@ours.com) sender not login”, and Amy will finally got this error message from external.com.



I have no idea how to deal with this situation, very appreciate if anyone can give me the solution or leave some comment, thanks.










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    0















    I have a Mail server (FQDN: mail.ours.com) using Postfix and Dovecot, users having email address like user@ours.com. Like many others SMTP server, if user claim that they are from @ours.com, they need to pass sasl or should be in mynetwork parameter according to the restriction setting; so if user do not pass sasl and not having the ip address in mynetwork, they may got some error message like “sender not login”.



    The situation is when a user amy@ours.com want to send email to bob@external.com, but Bob do the setting to let his email forward to bob@ours.com. So SMTP server from external.com will interact with ours SMTP server and claim that the sender is from amy@ours.com wanted to send mail to bob@ours.com. After the request, SMTP from external.com will receive the error message from ours SMTP server said that “(amy@ours.com) sender not login”, and Amy will finally got this error message from external.com.



    I have no idea how to deal with this situation, very appreciate if anyone can give me the solution or leave some comment, thanks.










    share|improve this question







    New contributor




    Michael Ouyang is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






















      0












      0








      0








      I have a Mail server (FQDN: mail.ours.com) using Postfix and Dovecot, users having email address like user@ours.com. Like many others SMTP server, if user claim that they are from @ours.com, they need to pass sasl or should be in mynetwork parameter according to the restriction setting; so if user do not pass sasl and not having the ip address in mynetwork, they may got some error message like “sender not login”.



      The situation is when a user amy@ours.com want to send email to bob@external.com, but Bob do the setting to let his email forward to bob@ours.com. So SMTP server from external.com will interact with ours SMTP server and claim that the sender is from amy@ours.com wanted to send mail to bob@ours.com. After the request, SMTP from external.com will receive the error message from ours SMTP server said that “(amy@ours.com) sender not login”, and Amy will finally got this error message from external.com.



      I have no idea how to deal with this situation, very appreciate if anyone can give me the solution or leave some comment, thanks.










      share|improve this question







      New contributor




      Michael Ouyang is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      I have a Mail server (FQDN: mail.ours.com) using Postfix and Dovecot, users having email address like user@ours.com. Like many others SMTP server, if user claim that they are from @ours.com, they need to pass sasl or should be in mynetwork parameter according to the restriction setting; so if user do not pass sasl and not having the ip address in mynetwork, they may got some error message like “sender not login”.



      The situation is when a user amy@ours.com want to send email to bob@external.com, but Bob do the setting to let his email forward to bob@ours.com. So SMTP server from external.com will interact with ours SMTP server and claim that the sender is from amy@ours.com wanted to send mail to bob@ours.com. After the request, SMTP from external.com will receive the error message from ours SMTP server said that “(amy@ours.com) sender not login”, and Amy will finally got this error message from external.com.



      I have no idea how to deal with this situation, very appreciate if anyone can give me the solution or leave some comment, thanks.







      postfix mail






      share|improve this question







      New contributor




      Michael Ouyang is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




      Michael Ouyang is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      asked 11 mins ago









      Michael OuyangMichael Ouyang

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      Michael Ouyang is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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