The factors for the 550 email errors range from non-existing email accounts to a wrongly added email server rule. To rectify the error, first, we must examine the simple process behind every email communication. While sending an email, it's sent in the server email to the recipient email server. Later the recipient downloads the email from his email address. Therefore the mistake happens through this email delivery procedure that is either driven by the sender or by the receiver. In this blog, we'll go over the error'550-Unrouteable address' and its solution.
The Cause behind the Error'550-Unrouteable Speech'
While sending an email via Outlook or webmail, in the bounce message, the error message'550-Unrouteable speech' is displayed. We can monitor the origin of the mistake from the comprehensive bounce message. Understanding the causes of the mistake, help us to make the right resolution for the error.
Sending Emails to a Non-Existent Recipient Domain
When the email is delivered to a non-existing recipient domain, it reveals a'550-Unrouteable speech' error. Configuration errors in email server additionally cause mistakes, you can choose any remote server management firm like Idea mine to keep your server error-free. While sending emails to a deleted, deactivated, and died email domain additionally causes'550-Unrouteable address' error. So if the recipient mail addresses are wrong, the emails wouldn't be sent and would bounce back to the sender by giving an error message.
The answer here is to validate the recipient email address while sending the emails and assess whether the domain is neither died nor deactivated. To Be Able to confirm the email, use the following command:
whois domain.com
Make sure the domain name is resolving fine by verifying the DNS resolution benefits.
Dig domain.com
Incorrect MX Records for the Recipient Domain
The sender email server will not be able to route correctly to the receiver email server unless the MX records are set properly for the recipient domain. When there is an error in the DNS settings for your receiver domain, the other outside emails servers provide the email delivery as unreachable. The temporary DNS resolution issues with the sender's ISP make it hard to resolve the domain of receiver correctly which result in the collapse of email routing.
As a solution, always check whether the MX records are properly set for the recipient or not. You can use the following command:
Always try to link to the port 25 of the recipient email and verify that the connectivity is good. Use the command:
Contact the recipient server service, if you locate any connectivity issues to a remote email server or DNS errors or lacking MX records and get it fixed.
Security Limits
Many email servers will not accept emails from the senders whose email server is at almost any spam blacklist. Services such as Amazon SES can help you to land your emails in the inbox. There are email servers that accept mails only from grey-listed senders. In RDNS security checks, it's mandatory that the host IP and its host name have to map with each other. As a way to track the IP address to the sender name, a PTR record is defined. If the sending speech PTR record isn't matching with the receiving address, some servers will reject the email. If the receiver server can not verify the sender correctly, the email bounces back and thus displays the mistake.
For a solution for this, the RDNS for the sender email server IP is should be installed and can be possible with the code:
Host IP-address
Through checking the spam blacklist and confirming with the remote email server, the rejections or blacklisting in the recipient email server could be confirmed. To be able to guarantee the server in case of the blacklisting, scan the host and eliminate all spamming scripts and execute security measures. Check whether all of the email scripts are configured with the valid sender and recipient email addresses. Thus, we can avoid sending emails to invalid addresses.
Configuration Settings of Mail Server
In email such as Exim, the number of emails a domain name can send out every hour has a limitation. Following the limit exceeds, the emails will bounce back to the sender by simply exhibiting the error'550-Unrouteable address'. The wrong routing of this domain can also lead to the screen of this'550- Unrouteable address'. The firewalls and other safety rules in the recipient email server too turned into a reason for the malfunction. These scenarios are capable of creating the error'550- Unrouteable address'.
Decision
In producing the error 550 Unrouteable address', the sender and the recipient email server address has an essential function. In fixing the mistake, the initial step is to confirm whether the email addresses are correct or not. It should be the foremost target because most of those'550-Unrouteable speech' occurs due to the wrong email address equally in sender and receiver sides. Setting the MX records properly enables the administrators to rectify the error. Now, most of the email servers maintain strict security measures. So meeting the security or quality standards not only safeguard your email servers but also allow you to communicate with other servers. It eliminates the odds of displaying the error. You always have the option to opt for almost any server management company to maintain your own server error-free. In brief, the fixing of this malfunction'550- Unrouteable address' is only under the control of the host users.
Observing the essential standards and processes makes the server free from dangers of email communication, which is highly important in fulfilling the enterprise demands.
