Question

Ensure that system scripts can send email

Posted December 23, 2013 3.6k views
What needs to be done to make sure that system scripts are able to send emails to external email addresses when configured to do so?
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finid
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3 answers
pablo December 23, 2013
Install a mail server. See How To Install the Send-Only Mail Server "Exim" on Ubuntu 12.04.
How To Install the Send-Only Mail Server "Exim" on Ubuntu 12.04
by Pablo Carranza
Due to the popularity of Gmail, Google Apps, Outlook.com, Yahoo! Mail & a myriad of other providers, many cloud-server users mistakenly fail to install a mail server, initially. However, humans are not the only ones that send electronic mail. If fact, many Linux server applications also need to send email. This tutorial will review how to install a send-only mail server on Ubuntu 12.04.
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finid December 24, 2013
I did. There's Posfix/Devecot running on the system. Attempts to send emails by system scripts are returning errors, like:

ossec-maild(1223): ERROR: Error Sending email to 5.77.x.y (smtp server) 2013/12/23 15:29:52 os_sendmail(1765): WARN: RCPT TO not accepted by server - 'me@site.com'.

Any clues?
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pablo December 24, 2013
Have you seen this, thread: SMTP timeout?
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