What is a 421 email error?

What is a 421 email error?

421 – Your message was temporarily deferred by the recipient server. This is usually a result of too many connections in a short timeframe or too many messages. 450 – Your message was not delivered because the other user mailbox was not available. This can happen if the mailbox is locked or is not routable.

How do I fix error 421?

This commonly happens when HTTP/2 tries to reuse the connection request. Thus to fix this error, the reuse of connection by HTTP/2 should be stopped. Using separate SSL for each domain will help to avoid reusing the connection by HTTP/2. Another method is to move each domain to a different IP address.

How do I fix error 421 in Outlook?

How to Fix Error 421 Cannot Connect to SMTP Server?

1. Send/Receive Groups window.
2. Changing port numbers in Internet Email Settings window.
3. Enabling “Use the same settings as my incoming mail server” option.
4. Recreating Outlook account.
5. Turning Off Firewall in Windows Settings.
6. PST selection window in Stellar Repair for Outlook.

Can’t connect to Connection refused MySQL?

normally means that there is no MySQL server running on the system or that you are using an incorrect Unix socket file name or TCP/IP port number when trying to connect to the server. You should also check that the TCP/IP port you are using has not been blocked by a firewall or port blocking service.

What does 421 service not available mean?

And, FTP error 421 service not available means that the connection to the remote server can’t be established. FTP clients such as Filezilla returns the error like this: 421 Service not available, remote server has closed connection.

How do I fix a crashed MySQL database?

How to: How to Recover Crashed InnoDB Tables On MySQL Database Server

1. Step 1: Bring up your database in recovery mode.
2. Step 2: Check which tables are corrupted.
3. Step 3: Backup and drop your corrupted tables.
4. Step 4: Restart MySQL in normal mode.
5. Step 5: Import backup .sql.
6. Step 6: Change port.

What does Connection refused mean?

A “Connection Refused” error will occur if your client sends a connection request to a remote server host, and the remote host responds to say that it refuses to accept the request. The “Connection Refused” error essentially means that the computer is not accepting connections to the requested IP address and port.

How do I fix SMTP error 421?

[Resolved] 421 Cannot Connect to SMTP Server Error in Outlook [Partition Magic]

1. Fix 1. Re-add Your Email Account.
2. Fix 2. Set a Correct SMTP Port Number.
3. Fix 3. Check for Antivirus Software Interference.
4. Fix 4. Check for VPN Interference.

What causes MySQL tables to crash?

1. The major cause of the database corruption is the lack of free disk space on the server. 2. Other possible causes of MySQL table crashes include operating system problems, power failures, hardware issues, unexpected MySQL server termination, data corruption due to external programs, etc.