How to fix email error ‘501 5.1.7 invalid address’ in Exchange servers

How to fix email error ‘501 5.1.7 invalid address’ in Exchange servers

A commonly noted error in Microsoft Exchange 2007 server is when the emails from certain 3rd party applications or scripts fail to deliver.

The mails get rejected, giving this error message in the logs:

SMTP MAIL command failed Error (501) 5.1.7 Invalid address

Today, we’ll see what this error means and how to fix it in Exchange server.

Are you facing email errors in your site?

CLICK HERE TO FIX YOUR MAILS AT JUST $45

 

What is error ‘501 5.1.7 invalid address’?

As we all know, a valid email address has the format – user@domain.com. But in many email applications, people give the alias names in mail address fields – say, just ‘username’.

In older versions of Exchange, the default domain name gets appended automatically to these alias entries given in ‘MAIL FROM:’ or ‘RCPT TO:’ fields of email applications.

So, even if aliases are used, they get automatically converted to fully qualified email addresses by the Exchange server. But from Exchange 2007 onwards, this feature is absent.

So, when mail users try to send a mail with just an alias name, Exchange 2007 DOES NOT replace it with the full mail address, and it results in  ‘501 5.1.7 invalid address’ error.

[ You don’t have to lose your sleep over lost emails. Get our professional help to fix your mail errors for just $45. ]


Getting intermittent email errors?

No more delayed or undelivered emails. We'll fix your email errors in no time.

Click Now to resolve your email errors at just $45

Submit a Comment

Your email address will not be published. Required fields are marked *

Bobcares
Bobcares is a server management company that helps businesses deliver uninterrupted and secure online services. Our engineers manage close to 51,500 servers that include virtualized servers, cloud infrastructure, physical server clusters, and more.
MORE ABOUT BOBCARES

Privacy Preference Center

Necessary

Necessary cookies help make a website usable by enabling basic functions like page navigation and access to secure areas of the website. The website cannot function properly without these cookies.

PHPSESSID - Preserves user session state across page requests.

gdpr[consent_types] - Used to store user consents.

gdpr[allowed_cookies] - Used to store user allowed cookies.

PHPSESSID, gdpr[consent_types], gdpr[allowed_cookies]
PHPSESSID
WHMCSpKDlPzh2chML

Statistics

Statistic cookies help website owners to understand how visitors interact with websites by collecting and reporting information anonymously.

_ga - Preserves user session state across page requests.

_gat - Used by Google Analytics to throttle request rate

_gid - Registers a unique ID that is used to generate statistical data on how you use the website.

smartlookCookie - Used to collect user device and location information of the site visitors to improve the websites User Experience.

_ga, _gat, _gid
_ga, _gat, _gid
smartlookCookie

Marketing

Marketing cookies are used to track visitors across websites. The intention is to display ads that are relevant and engaging for the individual user and thereby more valuable for publishers and third party advertisers.

IDE - Used by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.

test_cookie - Used to check if the user's browser supports cookies.

1P_JAR - Google cookie. These cookies are used to collect website statistics and track conversion rates.

NID - Registers a unique ID that identifies a returning user's device. The ID is used for serving ads that are most relevant to the user.

DV - Google ad personalisation

IDE, test_cookie, 1P_JAR, NID, DV, NID
IDE, test_cookie
1P_JAR, NID, DV
NID

Close your account?

Your account will be closed and all data will be permanently deleted and cannot be recovered. Are you sure?