i've been trying to get the forum email notification working for a while through various configuration changes and testing, but have come to the conclusion that forum must be sending its mail differently from other modules & core items, so i thought i'd post it here...

i've set up user accounts in various types of email accounts: gmail, yahoo, hotmail, various pop accounts, etc...

i get exceptions in the logs like the following:

AssemblyVersion: -1
PortalID: -1
PortalName:
UserID: -1
UserName:
ActiveTabID: -1
ActiveTabName:
RawURL:
AbsoluteURL:
AbsoluteURLReferrer:
UserAgent:
DefaultDataProvider:
ExceptionGUID:
InnerException: The server rejected one or more recipient addresses. The server response was: 553 sorry, that domain isn't allowed to be relayed thru this MTA (#5.7.1)
FileName:
FileLineNumber: -1
FileColumnNumber: -1
Method:
StackTrace:
Message: System.Web.HttpException: The server rejected one or more recipient addresses. The server response was: 553 sorry, that domain isn't allowed to be relayed thru this MTA (#5.7.1) ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Runtime.InteropServices.COMException (0x8004020F): The server rejected one or more recipient addresses. The server response was: 553 sorry, that domain isn't allowed to be relayed thru this MTA (#5.7.1) --- End of inner exception stack trace --- at System.RuntimeType.InvokeDispMethod(String name, BindingFlags invokeAttr, Object target, Object[] args, Boolean[] byrefModifiers, Int32 culture, String[] namedParameters) at System.RuntimeType.InvokeMember(String name, BindingFlags bindingFlags, Binder binder, Object target, Object[] providedArgs, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParams) at System.Web.Mail.SmtpMail.LateBoundAccessHelper.CallMethod(Object obj, String methodName, Object[] args) --- End of inner exception stack trace --- at System.Web.Mail.SmtpMail.LateBoundAccessHelper.CallMethod(Object obj, String methodName, Object[] args) at System.Web.Mail.SmtpMail.CdoSysHelper.Send(MailMessage message) at System.Web.Mail.SmtpMail.Send(MailMessage message) at DotNetNuke.Modules.Forum.Utils.SendForumMail(Int32 PostID, String URL, ForumEmailType EmailType, String Notes)
Source:
Server Name: JILLC-WS17

i've run it by the hosting company and they say it has to do with smtp authentication.  i checked my settings and things looked fine there.  i then did further tests and found that all of the following modules / functions had email functionality that worked fine:

1) site registration

2) user role changes

3) site newsletters

4) smtp test in settings

5) various other modules (ventrian feedback center & private messages)

....so my question is: what is forum doing differently that these modules / functions are not doing?  is there any 'fix' for this?  i'd like to use the core forums because i think they are pretty well done, but this could be a deal-breaker.  let me know if i need to explain something better or provide more information. 

thoughts?

hownow, can you please check your General Settings and see if it has the checkbox checked for that send as user option. I need to know if hte outgoing emails are coming from a single address (you put in) or from a default one that was setup w/ the forum, or possibly from each user. If you installed the module and never changed anythign here, there is a good chance the outgoing mails are coming from admin@localhost. If this is the case, SMTP server will reject it because of SPAM.

The forums don't send mail any different then other parts of DotNetNuke. This module uses the same SendMail function used from registration. The difference here can be the sending from address. SMTP servers will not always allow certain addresses to be the from, because they appear to be spam.