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WebPanel => E-Mail => Topic started by: rafaballack on April 18, 2015, 04:39:00 PM

Title: Erro SMTP (450)
Post by: rafaballack 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).

Title: Re: Erro SMTP (450)
Post by: aeanez 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

Title: Re: Erro SMTP (450)
Post by: Administrator on April 19, 2015, 10:21:33 PM

or rebuild mail server without that option.

Title: Re: Erro SMTP (450)
Post by: rafaballack on April 23, 2015, 12:05:31 AM

Quote from: aeanez 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

Worked!
But when sending any email, does not receive

Title: Re: Erro SMTP (450)
Post by: Administrator on May 04, 2015, 09:25:47 PM

you should check mail server logs and your dns records.

Title: Re: Erro SMTP (450)
Post by: Freespirits_GR_Host 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. 

Title: Re: Erro SMTP (450)
Post by: umtu06 on January 18, 2023, 04:34:45 PM

i am getting the same error. I noticed that the hourly postal quota is full. Here are my LOG records. What should I do to get rid of them?

helo=87-207-170-128.dynamic.chello.pl, from=qdzftt632@3he.com.tr, to=qdzftt632@3he.com.tr,

Title: Re: Erro SMTP (450)
Post by: overseer on January 21, 2023, 09:17:15 PM

Quote from: aeanez on April 19, 2015, 10:56:13 AM

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

If it exists, I would also suggest commenting out:
#reject_non_fqdn_hostname, # too many misconfigured servers out there...

Code: [Select]