Sending Test Emails
The final test of the Diagnostics tool sends a test email to ensure that
you're email infrastructure is setup correctly and allows Reminder to send
If this test fails then Reminder will be unable to send any emails.
To troubleshoot this first ensure you
understand the basics of SMTP emails by reading this primer.
- Check the
email settings in SharePoint central administration are correct
(SharePoint Central Administration > Operations > Outgoing
Emails Settings) – note the Outbound SMTP server, From and Reply
To addresses. (Note - if you change anything here you must
restart the SharePoint Reminder Service to pick up the changes)
- Is the destination SMTP server configured to deliver emails
or relay them to another SMTP server and if so is it working?
- Is there anything that may block SMTP transmissions on port
25 (common to stop mass mailing worms/viruses). For example :-
- A firewall running on or in between the SharePoint
server and the SMTP server
- Remember that if your security blocks SMTP transmissions
based on process or account then test tools such as Telnet
or SMTP Test tool will be a different process and will often
be running under a different account to SharePoint and the
You are able to send test emails to some users, but not others
(Note – this section does not apply to emails sent by
SharePoint but only to test emails sent using a tool like SMTP Test
tool or telnet – see above)
The good news is that you know in this case that its not a
problem with SharePoint – its time to bring in whomever is an expert
on your email infrastructure but a few tips to get you started :-
- Is this user’s email is being delivered successfully from
other sources, what about external email addresses such as
hotmail / gmail?
- This can help narrow down the problem between problems on
the sending side an receiving side.
- Do emails to users on the internal domain get delivered and
external email addresses fail (or vice versa) – in which case
you need to look in detail at your email infrastructure to
determine where the problem lies.
- If internal emails are getting through but external ones are
not then use the SMTPDiag utility to verify DNS configuration on
your SMTP server are not stopping external delivery.
As always the wildcards are SPAM filters and email
auto processing rules – always suspect these first!