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How do I find out if I have a reverse DNS entry? |
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Reverse DNS is another way of fighting spam. It allows other Servers to check the authenticity of your server. You will need to know your IP address. You can look up your IP address using the ipconfig command within a Windows DOS console |
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I got a '451 4.3.5 Requested action aborted: local error processing' error |
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This error occurs when Icewarp Email Server is trying to read or write to disk and fails. The most probable causes of this problem are listed below: The directories set in the System -> Storage -> Directories tab do not exist |
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How do I control the retry intervals in the SMTP outgoing queue? |
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The Outgoing queue for sent mails from the Icewarp Mail Server is controlled by: file \Icewarp\Config\interval.dat (if it exists) Undeliverable Warning after X hours The first attempt at delivery is always just after |
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How to set Icewarp for retrieving messages from another SMTP server? (using ETRN/ATRN SMTP extensions) |
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ETRN (Extended TURN) is SMTP protocol extension for on-demand mail relay with DNS resolution with fixed IP address. It can be used to release the load of the destination server by using a gateway to filter spam and viruses. ATRN (Authenticated T |
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Interpretation of 5xx errors in Icewarp SMTP |
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SMTP delivery errors can occurr in SMTP session log and the category "5" indicates that a message was not delivered. The table below lists the most common SMTP errors with a short description to help you understand their cause, and provides b |
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How can I block messages which cause Outlook to hang? |
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Outlook hangs when downloading messages, causing the same message to be downloaded many times in a row and other messages cannot be downloaded.
Spammers and hackers have found new ways to harm Outlook users.WORKAROUNDBoth Outlook |
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Why I Am Receiving Duplicate Messages In Outlook? |
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If you are receiving duplicate messages in Outlook or Webmail, this will show what to look for and test to see where the problem resides.
This can be caused usually by either a malformed message, a bad connection betw |
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Possible Spammer Relaying Through My Server |
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If you have a spammer sending through you then the first thing you need to do is secure the server and require all users to authenticate to the server. This will ensure that at the very least you are able to see the account doing this in t |
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UID Errors In Outlook |
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The UID error is an outlook error. It happens when Outlook is trying to syncrhonize the e-mails.
Each e-mail is given a numerical UID number, and all new e-mails must have numbers higher than this. So, there are times when an e-mail is deleted |
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We Do Not Relay Errors When Sending |
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SYMPTOMSIf you cannot send a message and server's response is 'we do not relay', the problem is probably that you are not authenticated.
SOLUTIONIcewarp Email Server provides three main ways for a user to authenticate: |
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Message Size Exceeds Error |
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You will need to check these four locations of Icewarp and webmail Basic to ensure there is no maximum size set.
1. Inside webmail basic under [Settings], [Administrator Settings], scroll down until [Restrictions]. Here you will see the optio |
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How to read a basic SMTP transaction |
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The below SMTP log file represents the communication that happens between the client connection (such as outlook, or web mail) and the Server (Icewarp Mail Server). Each line of the log will show the sending statement from the client and then t |
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SMTP Threads/Connections Hung/Open and not closing properly. |
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If the Icewarp server is experiencing a large amount of incoming sessions that are not being released, (which fills up the SMTP connections and halts e-mail from being received), it is neccessary to turn on a spec |
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How to Stop Icewarp from accepting Spoofed E-mail. |
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A local Domain is being used to send spam to the serv |
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Working Around Your ISP Blocking Port 25 |
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If you are having problems sending mail from a mail client such as Outlook, Outlook Express, and Thunderbird when attempting at home or the office it is possible your ISP is blocking the outbound SMTP port (25).
We know most ISP's block outbo |
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