Issue Can't send emails from subdomains (Plesk Obsidian 18.0.24)

[erezg]

I am running Plesk Obsidian 18.0.24, on a Ubunto box in AWS. I have recently add a subdomain email.my_domain.com. I can receive emails but can not send email out.

I am getting the following error when trying to send an email from webmail ..

SMTP Error (550): Failed to add recipient "name@my_domain.com" (5.1.1 <name@my_domain.com>: Recipient address rejected: User unknown in virtual mailbox table).

Sending out emails on the main domain works fine.

Thank you!

Erez

 

[Bitpalast]

Does the recipient address really exist? Is it external or on your own server?

 

[erezg]

Hello Peter,

Yes, the emails really exist.

I am hosting multiple domains on one box.

I can receive from domains that are hosted on my box and external domains, such as gmail.com, etc.

I can NOT send emails to external domains.

Erez

 

[Bitpalast]

Please make sure that the recipient domain is unconfigured (does not exist) on the sender's server (your server). If it exists there, the server will try to deliver the mail locally which leads to exactly the symptom that you are describing.

 

[erezg]

Thanks for you reply. Can you please provide an example?

I am using the following settings.....

email.domain_1.com A XXX.XXX.XXX.XXX
mail.email.domain_1.com A XXX.XXX.XXX.XXX
emai.domain_1.com MX mail.email.domain_1.com
domain_1.com A XXX.XXX.XXX.XXX
domain_1.com MX mail.domain_1.com
_dmarc.email.domain_1.com TXT .....
_dmarc.domain_1.com TXT .....
domain_1.com TXT v=spf1 ip4:XXX.XXX.XXX.XXX include:spf.protection.outlook.com -all
email.domain_1.com TXT v=spf1 +a +mx ip4:XXX.XXX.XXX.XXX -all
NS1 NS53.DOMAINCONTROL.COM
NS2 NS54.DOMAINCONTROL.COM

email.domain_2.com A XXX.XXX.XXX.XXX
mail.email.domain_2.com A XXX.XXX.XXX.XXX
emai.domain_2.com MX mail.email.domain_2.com
domain_2.com A XXX.XXX.XXX.XXX
domain_2.com MX mail.domain_2.com
_dmarc.email.domain_2.com TXT .....
_dmarc.domain_2.com TXT .....
domain_2.com TXT v=spf1 ip4:XXX.XXX.XXX.XXX include:spf.protection.outlook.com -all
email.domain_2.com TXT v=spf1 +a +mx ip4:XXX.XXX.XXX.XXX -all
NS1 XXX.XXX.XXX.XXX
NS2 XXX.XXX.XXX.XXX

email.domain_3.com A XXX.XXX.XXX.XXX
mail.email.domain_2.com A XXX.XXX.XXX.XXX
emai.domain_3.com MX mail.email.domain_3.com
domain_3.com A XXX.XXX.XXX.XXX
domain_3.com MX mail.domain_2.com
_dmarc.email.domain_3.com TXT .....
_dmarc.domain_3.com TXT .....
domain_3.com TXT v=spf1 ip4:XXX.XXX.XXX.XXX include:spf.protection.outlook.com -all
email.domain_3.com TXT v=spf1 +a +mx ip4:XXX.XXX.XXX.XXX -all
NS1 XXX.XXX.XXX.XXX
NS2 XXX.XXX.XXX.XXX

 

[Bitpalast]

Simply click on the "Domains" tab and make sure that the recipient's domain is not present on your own (sender's) server.