Author Topic: Erro SMTP (450)  (Read 10989 times)

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Erro SMTP (450)
« on: April 18, 2015, 04:39:00 PM »
I can't send emails but can receive. Displays the message: SMTP Error (450): failed to add the recipient

"myemail@hotmail.com" (4.7.1 <xxx.208.26.82>: Helo command rejected: Host not found).

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Re: Erro SMTP (450)
« Reply #1 on: April 19, 2015, 10:56:13 AM »
hi rafaballack,

maybe you set "Reject Unknown Hostname" in postfix manager menu,

try to find and comment # this line

Code: [Select]
reject_unknown_helo_hostname
in /etc/postfix/main.cf an then

Code: [Select]
service postfix restart

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Re: Erro SMTP (450)
« Reply #2 on: April 19, 2015, 10:21:33 PM »
or rebuild mail server without that option.
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Re: Erro SMTP (450)
« Reply #3 on: April 23, 2015, 12:05:31 AM »
hi rafaballack,

maybe you set "Reject Unknown Hostname" in postfix manager menu,

try to find and comment # this line

Code: [Select]
reject_unknown_helo_hostname
in /etc/postfix/main.cf an then

Code: [Select]
service postfix restart

Worked!
But when sending any email, does not receive

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Re: Erro SMTP (450)
« Reply #4 on: May 04, 2015, 09:25:47 PM »
you should check mail server logs and your dns records.
AntiDDoS Protection (web + mail)
http://centos-webpanel.com/website-ddos-protection-proxy

Join our Development Team and get paid !
http://centos-webpanel.com/develope-modules-for-cwp


Services Monitoring & RBL Monitoring
http://centos-webpanel.com/services-monitor


Do you need Fast and FREE Support included for your CWP linux server?
http://centos-webpanel.com/noc-partner-list
Installation Instructions
http://centos-webpanel.com/installation-instructions
Get Fast Support Here
http://centos-webpanel.com/support-services

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Re: Erro SMTP (450)
« Reply #5 on: July 27, 2022, 08:27:24 AM »
I see the following error

Quote
smtp 450 failed to add recipient 4.7.1
even though the following parameter is disabled and not used

Code: [Select]
reject_unknown_helo_hostname

The problem appears even when i try to add recipients from the same hosted domains in the server. 

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