Step 1 : Add SMTP Feature to your Sharepoint Server.
Goto Start->Administrative Tools->Server Manager and then Click "Add Features"
Click SMTP-> Click "Add Required Features"
Step 2 : Install IIS 6 Management Console and Install IIS 6.0 Management console
Once u Installed, Open IIS 6.0 Manager Start->All Programs->Internet Information Services(IIS) 6.0 Manager
Step 3 : configure the SMTP server
Under [SMTP Virtual Server] second mouse click and properties
Step 4: In general ip address -> click Advance ->Set [all unassigned] port to 25
Step 5: Click Access tab and Set Authentication to -> Anonymous
Connection -> set All Except list below click ok
Click Relay -> Set All except list below -> ok
Step 6: Click Message Tab -> set the work below
Step 7: Click Delivery ->
In outbound Security Set Default to Anonymous Access
In Outbound Connections.
Step 8: Open Sharepoint Central Administration->System Setting-> open configure Outgoing email settings
Step 9: Set the Value
1."Outbound SMTP Server" -> system name (eg:sp)
2."From Address" -> configured email account (eg: [email protected])
3. "Reply Address" -> give reply address (eg: [email protected])
4.Character Set -> 65001(Unicode UTF-8)
then Click "ok"
That's it, now you configured outgoing mail for sharepoint 2010 sucessfully.

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