I have a large asp.net web application I need to run locally. The application has a large amount of email services and I want to make sure I don't send any email accenditally as I don't know all the inner workings of the code yet. How can I turn off SMTP functions on Windows 7.
Turn off SMTP on Windows 7
iis-7smtpwindows 7
Related Solutions
VPOP3 can limit its own bandwidth usage. See this knowledgebase article.
I recommend using HMailServer instead as it is free and much better (finer SMTP controls, better logging/troubleshooting tools). You can disable the POP and IMAP functionality easily.
Anyway, you should be able to change the IIS SMTP binding per below. It looks like it is for inbound, but it may also work for outbound. If not, I think it might bind to the first IP address in Windows, so you can make the IP you want to be the outbound the primary IP on your system. HMailServer will let you select the IP to bind to though.
Best Answer
DONT DO IT. YOu can not. But you can redirect them to a drop directory - i.e. everytime you send an email, a file is generated in a directory. That actually makes also sense in production (local SMTP Service, using the same directory for pickup - emails are generated faster than a SMTP connection). Check the web.config - locally or globally - for how to configure how SMTP deals. THis is also in IIS configuration manager ;)
For a short term fix (with possible side effects) change the WIndows FIrewall to block outgoing connections to port 25 (SMTP). Carefull - that will also affect any email client running, obviously.