HostMonster Web Hosting Help
Sending Emails Generates Error: 503 valid RCPT command must precede DATA.
Why do I receive error "503 valid RCPT command must precede DATA" when attempting to send email?
This usually is a result of the mail server requiring authentication.
If you are using Outlook 2003, here are the steps to enable authentication:
Note: If you are still having errors, make sure your login username is your full email address and that the password is correct.
- Open Outlook
- Go to Tools | Email Accounts
- "View or change existing e-mail accounts" should already be marked
- Click Next
- Select the Account with the trouble and click Change
- Click on More Settings
- Click on the Outgoing Server Tab
- Click "My outgoing server (SMTP) requires authentication" and make sure "Use same settings as my incoming mail server" is selected
- Click on the Advanced Tab
- Set "Outgoing server (SMTP):" port to 26
- Click OK and then Test Account Settings
- If everything is fine and reports no errors,
- Click Close.
- Click Next.
- Click Finish.
- If an error does occur, it will switch to the Errors tab and display the error
Knowledgebase Article 195,018 views bookmark
sharetags: connect email send unable (updated 1707 days ago)
Share or save this via:
Recommended Help Content
"503 valid RCPT command must precede DATA" (updated 984 days ago)
Trying to send out emails from multiple email accounts fail from both webmail and third party email clients. Possible Reasons: The maximum emails per hour has been exceeded. This can be caused by forw (updated 1629 days ago)
When setting up an account in Outlook or Outlook Express I get an error saying unable to connect to my SMTP server. (updated 1167 days ago)
Related Help Content
Explanantion as to what causes this the happen and how to fix it. (updated 783 days ago)
You can try sending the email on port 26, which is an alternate SMTP port and see if that works for you. For outlook: (updated 678 days ago)
I get an error sending with Thunderbird, I can receive fine and I tried sending on Port 26 and it still does not work. How do I fix this problem? (updated 2001 days ago)
The most common cause is that you are either sending to or sending from an invalid email address. You will want to create a new email address, and change your profile to use a different Email address. (updated 2007 days ago)
My domain's MX records point elsewhere and I cannot send emails to my domain from the web. (updated 1852 days ago)
I send an email to one person and then do a carbon copy (Cc) to multiple other people. Not everyone is receiving the email, even when I try using blind carbon copy (Bcc). (updated 630 days ago)
Knowledgebase Article 68,371 views tags: blind carbon carboncc copy email mail multiple partial people persons receive receiving
Why can I not send/receive certain types of attachment? (updated 1965 days ago)