
Send email via Telnet to test a Microsoft Exchange server
Quickest way to test SMTP connectivity on an Exchange server? Telnet to port 25 and send an email manually. Works on 2003, 2007, and 2010 with no tools needed.
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3 articles tagged “exchange-2007”

Quickest way to test SMTP connectivity on an Exchange server? Telnet to port 25 and send an email manually. Works on 2003, 2007, and 2010 with no tools needed.

If Outlook keeps prompting for credentials every time it launches over RPC over HTTP, switch proxy auth to NTLM and adjust LmCompatibilityLevel. Fixes the caching issue.

Exchange 2003 has built-in spam filtering that actually works. Here's how to configure Spamhaus RBLs, recipient filtering, Sender ID, and the IMF. No third-party software needed.