Administrator's Guide - Kerio Software Archive

15.2 SMTP serverinterface originally developed for communication with MS Exchange. In MS Entourage,the interface is represented as an Exchange account and it is based on WebDAV traffic.The WebDAV interface in MS Entourage provides similar options as the Kerio OutlookConnector. This implies that, in addition to email manipulation, it enables working alsowith groupware data (email, calendars, contacts, public folders), it supports Free/Busyserver, etc.In older versions, IMAP protocol was used to access email and the WebDAV interface wasused for other folder types. MS Entourage 2004, however, uses WebDAV also to access toemail folders.Cooperation of Kerio MailServer with MS Entourage is supported directly. This meansthat no extension is required to be installed at client stations. It is only necessary to setcorrectly the basic parameters for an Exchange account.To learn more on MS Entourage and its correct settings, see chapter 38.15.2 SMTP serverSMTP server settings protect the server on which Kerio MailServer is running from misuse.Protection of the SMTP server enables users to define who will be allowed to use this serverand what actions he/she can perform. This way, the server is protected from being misused. Ifthe SMTP server is available from the Internet (anytime when at least one MX record is directedto it and the port 25 is available for access), any client can connect and use the server to sendan email message. Thus the server can be misused to send spam messages. Recipients of suchemail messages will see your SMTP server as the sender in the source text and might blockreceiving messages sent from this server. Thus your company might be considered a spamsender and your server can be added to a database of spam servers.Kerio MailServer provides a protection system that enables users to define who will be allowedto send email via this server and where. Anyone can connect to the SMTP server to sendmessages to local domains. However, only authorized users will be allowed to send email toother domains.In this section, the delivery parameters can be also set:Relay Control TabUse the Relay control tab to set groups of allowed IP addresses and/or user authenticationagainst SMTP server.Allow relay only forUse this option to activate user authentication by IP addresses or usernames and passwords(see below). Generally, authenticated senders can use email messages to any domainvia this server, whereas unauthorized users can send messages only to local domains.Also add all trustworthy servers to this IP group. These servers will not be checked bythe SPF and Caller ID modules (for details, see chapter 16.5). Trusted servers will not be141