ETRN Download

Short for Extended Turn, ETRN is an extension to the SMTP mail delivery protocol that allows an SMTP server to request from another SMTP server any email messages it has for a specific domain. ETRN is typically used by a mail server that does not have a dedicated connection to the Internet.

The ETRN download node lets you to define ETRN or ATRN (Authenticated TURN) client requests to remote mail servers, allowing you to have IceWarp Server pick up messages held on other servers.

Multiple downloads can be defined and message collection(s) can be scheduled.

Figure. ETRN download General section.

Button	Description
Active	Check the box to enable this feature.
Add	Click the button to add a download definition. The ETRN/ATRN Item dialog opens. See bellow.
Edit	Select a download definition and click the button to edit this definition. The ETRN/ATRN Item dialog opens. See bellow.
Delete	Select a download definition and click the button to remove this definition.
Schedule	Click the button to define a schedule for downloads.
Download Now	Click the button to start a manual connection and collection of mail.

Figure. ETRN / ATRN dialog.

Field	Description
Description	A description of this download so you can identify it.
Hostname	Specifies the full hostname or IP address of the remote mail server including the port if required.
Domain	If this is an ETRN connection, specify the domain name here.
User	If this is an ETRN connection, specify the user name for authentication here.
Password	If this is an ETRN connection, specify the account password here for authentication.
ATRN	The default mode for collecting messages is ETRN. If the server you are collecting from requires ATRN (Authenticated Turn), check this box and specify the Domain, User and Password to be used for authentication as described above.