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"451 Please try again later" when sending emails from Outlook

When you try to send emails from Outlook, you receive the following message: An unknown error...
"Error 0x800CCC78" when sending emails

When you try to send emails, the following message will be returned to you: Sending' reported...
"Error 0x800ccc0d or 0x800ccc0f" when sending or receiving emails

When trying to send/receive emails you receive one of the following messages: The server could...
"Message Could Not Be Retrieved" or "Server Error: 0x800CCC90, Error Number: 0x800420CD"

This problem originates from the inability of Outlook to download a particular email from the...
"too many attachments" when sending an email

In the shared hosting environment, the maximum number of attachments that can be sent in an email...
503 valid RCPT command must precede DATA

If, when sending an email, the server returns the error message "503 valid RCPT command must...
535 Incorrect authentification data

Most often, this message is caused by the corruption of the password file in your account. To fix...
550 Access denied - Invalid HELO name

To remove this error in Outlook please follow the steps below: go to Tools >> Accounts...
550 Authentication is required for relay

To solve this issue it is necessary to enable SMTP authentication in your email client (in...
A friend (client) sent me a very important email that I did not receive. What is happening?

The causes that can cause this problem are: The IP of the sender's email server is in one of...
Abuse and postmaster: why can't I create email accounts with these prefixes?

For all domains hosted on HostX servers, email accounts that use the prefixes "postmaster" and...
Checking the ports 25 and 110

If you are running Windows 2000/XP operating system on your workstation, please follow these...
Email error 554

Error 554 is a generic error message that is accompanied (generally) by a complementary...
Error SMTP Outlook SMTP: 0x800CCC0B

This error does not originate from the server on which your site is hosted. Possible causes: 1....
How do I change the number of IMAP connections in Mozilla Thunderbird?

The maximum number of IMAP connections that can be opened by an IP on the Linux email servers...
How to disable IDLE processes generated by email client?

The IDLE (IMAP Push) function is used by most email clients. It is based on the principle that...
How to enable Telnet in Windows Vista

By default, Telnet is disabled in Windows Vista. Activation can be done as follows:1. Start2....
Identifying and troubleshooting errors that occur while using Outlook or Outlook Express

SymptomsWhen trying to send/receive an email, you may receive one of the error messages below:...
Mail Failure - Too Many Recipients

From: Mail Delivery System [mailto:[email protected]]Sent: Friday, Jan 20, 2011...
My email account is full, I can't receive any more messages. How can I solve this problem?

  go to CPanel (http://www.yourdomain.ro/cpanel) go to the Email accounts section in the...
My mobile device cannot send emails. Why?

We recommend that you make sure that SMTP authentication is enabled in your email client. If...
My provider blocks access to port 25 thus blocking access to your SMTP server. How can I solve this problem?

Try using port 26 for access to our SMTP server.In Outlook you must follow the following steps:...
Retry time not reached for any host

The "Retry time not reached for any host" error means that a previous attempt to deliver an email...
SMTP error when sending emails to Yahoo!

SMTP error from remote mail server after initial connection: host b.mx.mail.yahoo.com...
Sender verify failed

SMTP error from remote mail server after RCPT TO:<[email protected]>:host mx.server.ro...
Socket error: 10061, Error Number: 0x800ccc0e

When trying to download/send emails using Outlook Express or Outlook, your messages may return:...
Testing an email filter in cPanel returns error 503. Why?

Testing email filters in cPanel does not always work properly and may return the error below:...
The attempt to read data from the server ‘mail.domain.ro’ failed

To solve this situation in MacMail go to Mail >> Mailbox Table >> Synchronize...
The email server is "down". I can't access my emails.

Your email server is online but access may be restricted or there may be a connection problem...
The server IP is in an antiSPAM blacklist. What should I do ?

In such situations, please contact the Technical Department together with the error that was...
Unknown error, error number: 0x800c0133

This problem is caused by the corruption of the Outlook Express - Inbox file. To remedy this it...
Unroutable address / Unroutable mail domain

The error "Unroutable address/Unroutable mail domain" can have several causes: a wrongly typed...
Viewing email headers in Outlook 2010

  Open the message whose headers you want to view Click on the "Options" tab In the field...
Viewing email headers in Outlook Express, Mozilla Thunderbird, Windows Live Hotmail, GMail, Yahoo! Mail or Apple Mail

Outlook Express: 1. Open Outlook Express 2. Right-click on the email whose headers you want to...
Why are my emails being downloaded very slowly?

In general, these situations are caused by an Internet connection with problems or problems with...
Why are my emails sent to Yahoo/Hotmail/Gmail in junk/bulk/spam?

In general, these situations are caused by complex antiSPAM filters on the destination servers...
Why can't I see IMAP folders?

To solve this situation you must subscribe to the IMAP folders. Most email clients have a "Manage...
Yahoo: "554 5.7.9: Message not accepted for policy reasons"

This error occurs because Yahoo cannot verify that the email arrived from a legitimate sender. To...