P.S.:

I have tested it with an external SMTP server. This server run all of my own emails. The same. I receive posted messages from contact form, but from the "forgot password?" link  I get the message: "Sorry, your password could not be sent ..."

System Log:

2013-10-13 12:44:22,363 ERROR 93.128.244.63 - de-DE - /Secure/RecoverPassword.aspx - mojoPortal.Web.UI.Pages.RecoverPassword - unable to send password recovery email. Please check the system.net MailSettings section in web.config
System.InvalidOperationException: The SMTP host was not specified.
   at System.Net.Mail.SmtpClient.CheckHostAndPort()
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at System.Web.UI.WebControls.LoginUtil.SendPasswordMail(String email, String userName, String password, MailDefinition mailDefinition, String defaultSubject, String defaultBody, OnSendingMailDelegate onSendingMailDelegate, OnSendMailErrorDelegate onSendMailErrorDelegate, Control owner)

In my user.config:

  <add key="DisableDotNetOpenMail" value="false" />
  <add key="SMTPServer" value="smtp.1und1.de" />
  <add key="SMTPRequiresAuthentication" value="true" />
  <add key="SMTPUseSsl" value="false" />
  <add key="SMTPPort" value="25" />
  <add key="SMTPUser" value="myalias@something.de" />
  <add key="SMTPPassword" value="mypassword" />
  <add key="SMTPTimeoutInMilliseconds" value="15000" />

Hi Joe,

thanks for response.
The site is 2.3.9.9 (4) and <add key="EnableSiteSettingsSmtpSettings" value="false" />

Best
Matthias

Hi Joe,

That was it! Thank you. Time for a coffee :-)
Can you please tell me what I need to do to make the German umlauts are written properly in the email? Could be useful if the password has any.
Best
Matthias

Unfortunately, not: "Ihr Passwort f�r die Anmeldung ..."

I insert utf-8 here:

<!-- Leave this blank for ASCII encoding. Allowed values are utf-8, utf-32, and unicode -->
<add key="SmtpPreferredEncoding" value="utf-8" />

I tried it also in the user.config but without success.

Best
Matthias