{"id":6333,"date":"2018-11-24T07:35:28","date_gmt":"2018-11-24T07:35:28","guid":{"rendered":"https:\/\/www.siliconhouse.net\/support\/?page_id=6333"},"modified":"2018-11-24T07:38:42","modified_gmt":"2018-11-24T07:38:42","slug":"mail-error-550-unroutable-address-in-linux","status":"publish","type":"page","link":"https:\/\/www.siliconhouse.net\/support\/linux-reseller-web-hosting\/mail-error-550-unroutable-address-in-linux\/","title":{"rendered":"How to troubleshooting the mail error: 550 unroutable address in linux."},"content":{"rendered":"<pre>Email is abbreviated by Electronic Mail. Information stored on a computer\r\nthat is exchanged between two users over telecommunications. E-mail is a\r\nmessage that may contain text, files, images, or other attachments sent\r\nthrough a network to a specified individual or group of individuals. When\r\nsending an email it should required some fields of data.Three are To ,\r\nFrom if you are replying to a message, the To: and From: fields are\r\nautomatically filled out. The Subject should consist of a few words\r\ndescribing the e-mail's contents.Finally, the Message Body is the location\r\nyou type your main message.\r\n\r\nThe error \u2018550-Unroutable address\u2019 occurs due to the routing issues that\r\nhappen in this mail delivery process, which can be due to either the\r\nrecipient or sender problems.\r\n\r\nThe unroutable mail domain error message is a very general error message\r\nof mail server which could means a lot of things and possible causes of\r\nerror. This type of error can be due to a variety of reasons. The\r\nrecipient's email address might be misspelled. You also might have exceeded\r\nthe maximum number of e-mails you are allowed to send per hour, in which\r\ncase you should allow some time and then resend the mail. Your mail server\r\nmight also be unable to determine the correct route to send your email\r\nmessage because of a DNS configuration error with the recipient domain's MX\r\nrecords. This can be addressed by the owner of the recipient address.\r\n\r\nReasons and solutions:\r\n\r\n1.Sending Emails to a Non-Existent Recipient Domain :\r\n\r\nWhen the email is delivered to a non-existing recipient domain, it shows a\r\n\u2018550-Unroutable address\u2019 error. Another reason for the error is when the\r\nuser sends an email with a wrong typo in the email address.So if the\r\nrecipient email addresses are wrong, the emails would not be delivered and\r\nwould bounce back to the sender by giving an error message.\r\n\r\nSolution : The solution here is to validate the recipient email address\r\nwhile sending the emails and check whether the domain is neither expired\r\nnor deactivated\r\n\r\n2.Incorrect MX Records for the Recipient Domain :\r\n\r\nThe sender email server will not be able to route correctly to the\r\nrecipient email server unless the MX records are set properly for the\r\nrecipient domain. If there is any error in the DNS settings for the\r\nrecipient domain, the other external emails servers render the email\r\ndelivery as unreachable.\r\n\r\nSolution: So always verify whether the MX records are correctly set for the\r\nrecipient or not.\r\n\r\n3.Email exceeds per hour :\r\n\r\nIn email server such as Exim, the number of emails a domain can send out\r\nevery hour has a limit. After the limit exceeds, the emails would bounce\r\nback to the sender by displaying the error \u2018550-Unroutable address\u2019.Wrong\r\nrouting of the domain, where the mails are routing to remote server instead\r\nof local mail server, can also end up giving email error 550.\r\n\r\nAnti-spam firewalls or certain security rules in the recipient mail server\r\ncan lead to email bounces with 550 error.\r\n\r\n4.Verification Failure:\r\n\r\nThe sender\u2019s mail server or recipient\u2019s mail server may also has sender\r\nverification turns on, in which if the verification fails, you will have\r\n550 unroutable error.\r\n\r\nHowever, the root cause is still related to DNS problem mentioned above as\r\nthe setting enables check and verify if the MX record of the sender is\r\nvalid.<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Email is abbreviated by Electronic Mail. Information stored on a computer that is exchanged between two users over telecommunications. E-mail<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":10,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-6333","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to troubleshooting the mail error: 550 unroutable address in linux.<\/title>\n<meta name=\"description\" content=\"It is a very general error &quot;550 unroutable address&quot; message. 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