RSS Feed
Knowledgebase : Technical Help > Old versions > IceWarp Mail Server Administration > SMTP/Email Delivery
 

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 option for [Max...
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 the SMTP logfile....
An increasingly common way for senders to send spam is to use the recipients domain name, or e-mail address as the FROM address in the sent e-mail. Since the sender is a local domain account this will bypass most anti-spam filtering techniques. If y...
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. \n\nWORKAROUND\n\n Both Outlook and ...
The Outgoing queue for sent mails from the Icewarp Mail Server is controlled by: * file IcewarpConfiginterval.dat (if it exists) * Undeliverable Warning after X hours The first attempt at delivery is always just after the message enters the que...
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: Make...
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 the respo...
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 TURN)...
An increasingly common way for senders to send spam is to use the recipients domain name, or e-mail address as the FROM address in the sent e-mail. Since the sender is a local domain account this will bypass most anti-spam filtering techniques. If y...
This error occurs when Icewarp Email Server is trying to read or write to a 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 * The Icewar...
If your smtp daemon is unstable, you are experiencing random smtp restarts or unresponsive smtp you might use this workaround. The workaround consists in replacing smtp daemon with the older version of smtp from version 9.4.3. PREREQUISITE: ICEWARP ...
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 SPECIAL TYPE OF LOGGING THAT WILL HELP SUPP...
\N\NSYMPTOMS\N\N If you cannot send a message and server's response is 'we do not relay', the problem is probably that you are not authenticated. \N\NSOLUTION\N\N Icewarp Email Server provides three main ways for a user to authenticate: * Relay IPs...
Delivery Reports provide you with the status of sent email messages. Information regarding all recipients of any sent email is available. Users who come from an Exchange environment and are used to one centralized root folder will find this configur...
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 between the client and mail server...
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 outbound SMT...