Nagios Support Forum

configure the email system so that it can receive the status of my servers but at the time of performing an email test you send me the following error.

A test email was sent to [email protected]
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Mailer said: [03-24-2021 13:45:42] The following sender address failed: [email protected]: MAIL FROM command failed, authentication required. Learn more at https://support.google.com/mail/?p=WantAuthError b9sm768150ooa.47 - gsmtp, 530,5.7.0 SMTP server error: MAIL FROM command failed Detail: Authentication required. Learn more at https://support.google.com/mail/?p=WantAuthError b9sm768150ooa.47 - gsmtp SMTP code: 530 Additional SMTP information: 5.7.0 SMTP server error: MAIL FROM command failed Detail: Authentication is required. Learn more at https://support.google.com/mail/?p=WantAuthError b9sm768150ooa.47 - SMTP code gsmtp: 530 Additional SMTP information: 5.7.0 (method = smtp; host = smtp.gmail.com; port = 587; security = tls), Referer: admin / testemail.php
An error occurred while sending a test email !!!

Gmail will not let you send mail that has a From field set to an email address that you don't control. It's a security measure that prevents Gmail's SMTP server being used to send spoofed email.

If you really do have access to [email protected], you can add it by logging into Gmail, then go to Quick Settings (gear icon, top right) => See All Settings => Accounts and Import, and add the email address there.

in the company we have an email domain through snmtp
I tried sendmail but it says mail sent correctly but nothing reaches me

It would be a great help to fix it ... since I want me to choose the notifications to outlook accounts



How could I configure my snmp to receive notifications?

Using the "sendmail" method will work well only if you do extra setup steps. Without the extra setup, sendmail likely has your message queued, and when it tries to send it, it's rejected by the destination server because it doesn't trust your server. It'll sit in the queue and never get delivered. At a high level, you need to set up DKIM signing for your Nagios XI box or have your mailer daemon (running on your Nagios XI machine) automatically route the mail thru your company's email server. Frankly, it's a pain to set up and you're much more likely to get an external SMTP server to send your mail.

tl;dr: Use SMTP instead of sendmail.

If you have a corporate mail server, ask your system admin team for the credentials and server addresses to send mail thru it.