The outlook error 503 valid RCPT command must precede DATA is usually encountered while sending email simply implies that the message did not reach its intended destination or recipient.
As ugly as the error message sounds, you need not fret if you get the Outlook error 503 message as this may happen to any user due to several reasons.
If you are using the Outlook Express on your PC and receive this message while sending an email, this article is especially for you. We will extensively discuss the cause of Outlook error 503 and how to fix the error.
Usually, when you get the Outlook error 503 message while trying to send emails, it may be as a result of any of these two major reasons listed as follows:
These two are the causes of the Outlook error 503 valid RCPT command must precede data. Let us now discuss how to fix this error.
Usually, the Outlook error 503 problem arises as a result of some errors in the settings connected to the email server. The email cannot be sent because of a few trivial mistakes, as well. Here are some arranged solutions which have been tested to remove and fix the 503 error Outlook problems;
Most users who had the error 503 Outlook issue have found this very useful. While inputting the name of the recipient for the email make sure you remove apostrophes. Also, should the sender of the email inform you that he or she cannot seem to send an email, ask them to remove any apostrophes present.
Confirming if apostrophes are used can solve this unwanted problem. After removing the apostrophes, you can go ahead to confirm if you can send the email.
VPN connections help make you anonymous online. If you are using any and you encounter the 503 Outlook error, make sure you turn off the VPN connection because a VPN connection can malfunction at any time as a result of some security measures. After turning your VPN off, try sending an email again or confirm if the error 503 message still appears.
Is your mailbox full? If yes, you need to have it cleared out immediately. The 503 valid RCPT command must precede data error may also arise due to this seemingly minor issue.
Using Outlook to send an email, confirm that copies of emails are not saved on the server by;
After following these processes listed above, try to resend the email or refresh your mailbox after clearing out your mailbox to confirm if the error 503 outlook problem persists.
Before attempting to send a new email to anyone, it is important you confirm if there is any new message in your mailbox. Using Outlook, press the F9 key from the keyboard to perform that same task.
After that, you need to reboot the email service. Remember to run the spam filter on the email application which may take up to 30 minutes to reach completion and allow it reset to be able to send emails like as previously. After this, you may attempt to send the email.
This happens to be the most helpful fix to completely obliterate 503 valid RCPT command must precede DATA. As a result of incorrect authentication of SMTP, a lot of users have had to deal with this problem. To authenticate the email service simply navigate to the ‘My server requires authentication’ option.
Also, you may decide to change the outgoing port from 25 to 26. This swift change can relieve you from the hassle instantly. Sadly, some Service Providers may not support the port 25 for email services.
Should you, however, use the Outlook 2016 application, then here is an excellent solution to resolve issue 503 valid RCPT command must precede DATA. To configure your SMTP and resolve 503 issue, follow the steps as listed below;
Various reasons can cause Outlook error 503 valid RCPT command error. But you can fix the problem using the best third-party tool like Stellar Outlook Repair. It scans all the corrupted PST files, repairs, and restores all mailbox contents speedily.
The repaired email attachments are saved as new PST files. You can then import them in Microsoft Outlook.
Here are the detailed steps to repair pst with this software:
Step 1: Add .pst File
Launch the Stellar Outlook Repair tool. Click 'Select Outlook PST' in the home tab. A pop-up window will appear. It asks you to Browse or Find the PST file for data recovery.
Step 2: Repair the pst File
Now hit the Browse button if you know the location. If you do not know, click Find to search the PST.
Then, click Repair to start the PST repairing process for Microsoft Outlook mailbox recovery. The scan time depends upon the PST size and extent of corruption data.
Step 3: Preview and Save
Preview the restored Microsoft Outlook mailbox items. Then choose 'Save Repaired File' in the Home tab. A pop-up screen will occur with file format options. Select the PST file and click Browse. Finally, Click OK to save recovered mailbox data.
Trying to reach friends, loved ones or business associates via email and not being able to do so can be frustrating. Carefully apply the tips and suggestions as rendered in this article, take note of trivial things that may have caused the 503 issue to prevent it from occurring subsequently thereby fixing the Outlook Error 503 valid RCPT command must precede DATA.