: POP3 and IMAP4 are email receiving protocol. To send email, Outlook Express and Microsoft Outlook have to use SMTP protocol. Our email system provide SMTP authentication to protect our customers from spam or junk mails. To use our email authentication, email client have to use our setting from below.
: There are many reasons to cause email failure and most of them are from the following reasons.
Sender's DNS does not work. Browse your browser to the following address to check your sender : http://network-tools.com/default.asp?prog=dnsrec&host=[domain name]For example, if sender's email address is email@example.com, URL will look like this : http://network-tools.com/default.asp?prog=dnsrec&host=abc.comIf message appears...
Retrieving DNS records for abc.com...Attempt to get a DNS server for abc.com failed: abc.com does not exist in the DNS
or other error messages which are not DNS record, the domain seems to have problem. Sender might have to use another email address to send an email.
In case that incoming emails are identify as spam by system, you can look in to your junk box and set sender address as safe sender address or inform your system administrator to add sender address to company white-list.
Email format might not use general email standard (MIME)
Your domain name might expire or name server has problem. In this case, you can method #1 to identify problem.
If you follow method #4 and still have problem, contact firstname.lastname@example.org
: There are several reasons but most of the times are of the following.
Recipient server rejects your mails.
Recipient server treats your mails as junk.
In case that you used mail client before, it is possible that your SMTP authentication setting are incorrect. For Microsoft Outlook 2003 or Outlook Express, you can download configuration manual from links below.
If you receive the following messages after you sent an email...
550 Recipient address not accepted. This happens when your SMTP authentication settings are incorrect.
550 Your message was not delivered for policy reasons. Or other messages in the same meaning. This happens when recipient server has blocked your email address.
If you encounter other problems using our system please provide the following information to email@example.com
: You can use Rules to block or move unwanted emails to deleted folder.
Rule Condition : From in firstname.lastname@example.org,*@def.comRule Action1 : Store in Trash Rule Action2 : Discard
As a result, when sender address are from test@@abc.com or any accounts with def.com domain, all mails will be move to trash automatically.
If you want to block unwanted mails, use the following setting.
Rule Condition : From in email@example.com,*@def.com Rule Action : Discard
As a result, all emails from firstname.lastname@example.org or any accounts with domain def.com will be blocked.
Or you can follow the manual to add any unwanted email addresses in to blocked sender address list.
Download white list and black list manual for Debutmail Basic.
Download white list and black list manual for Debutmail Pro.
Download Rules manual for general users.
: You can do the following steps.
: When email client download mails from server through POP3, all those mails are marked as downloaded and create index for those mails. If the index are deleted or damaged (from any reasons), all mails will be downloaded again. This might cause mail duplication problem. To solve this problem, methods are different in each email client.
For example: In Outlook Express, you can search index file (pupuid.dbx) in your computer and then delete it. Outlook Express will recreate new index.
But you cannot use this method with Microsoft Outlook because its index are stored in many files. However, installing Hotfix from Microsoft might solve this problem. For more information please follow this linkhttp://support.microsoft.com/kb/885870
In many cases, the problem occurs with users who use POP3 email client to download mail from more than one account and keep all downloaded messages on the server. And the indexes for storing unique id of downloaded messages are damaged. To prevent this problem, you can set your mail client to delete downloaded messages from server.
: In general, system filter all spam mail by the following factors.
: In general, mail content that has Thai language use standard character encoding as Windows-874, TIS-620, ISO-8859-11 or UTF-8. Other than those character set, recipient cannot read the message. To prevent this, sender has to use standard character encoding to send an email.
: Vacation Message function is an auto-response system to reply incoming mails. Normally, it will be used when users are on vacation, leave or any circumstances that users cannot reply mails. For more information, please read from the following manuals.
: Spoofing Mail is a mail that tricks or pretends that the mail is sent from another person or trusted person. Most of the time, sender intends to get information from recipient or to avoid antispam system. To prevent spoofing mail, use Sender Policy Framework to check sender.
To protect from spoofing mail, domain owner have to set their domain sender policy by setting mail server's name or IP address to other servers. When someone tries to impersonate domain that has sender policy, most of modern servers are able to detect that mails are spoofing mails or are sent from fake server. System administrator can use this information to block or manage senders in proper way.