Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Help me understand SMTP server bounces and lockdown

Posted on 2003-11-15
3
480 Views
Last Modified: 2013-11-30
I'm using Win 03 Server Pro and the bundled Virtual SMTP server. I'm storing email addresses in SQL Server and sending auto verification message using a 3rd party DLL (xp_smtp_sendmail) - not exchange server or MAPI client. I need to understand what happens when a user stores an invalid email address - well formed but invalid -

It would end up in the Badmail directory?
It will re-try until Expiration timeout setting?


On the lock down side of things...

This server functions as a web server (sits in Web Service Provider farm) and needs to provide outbound mail for the local SQL Server, ASP pages and the occastional direct email from the System Admin. Given that profile, what setting should i implement to for adaquate security?

0
Comment
Question by:juststeve
  • 2
3 Comments
 
LVL 21

Expert Comment

by:marc_nivens
ID: 9778303
If the application were to try to send an email to an invalid address via Win2k3 SMTP, the message would be NDR'd.  Badmail is for NDR's that cannot be returned to sender due to an invalid from address.  So if your application were using a bogus from address, then these messages would in fact end up in badmail.

As far as security (at the SMTP level at least) you should lock down the relay settings for the virtual server.  Make sure the list for allow relay says "only the list below", and that the local server is the only one listed.
0
 

Author Comment

by:juststeve
ID: 9778878
Thnkx. What's the DROP folder for?
0
 
LVL 21

Accepted Solution

by:
marc_nivens earned 350 total points
ID: 9784379
You can take any propery formatted message and put it in the drop folder to be queued for delivery.  SMTP enabled apps that run on the server often do this.
0

Featured Post

Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

If you are anything like me, you install many apps on your phone and have your life on it, sometimes literally.  When I bought my current phone, a Samsung Galaxy S5 from Verizon, they were only selling the versions with 16 GB internal.  I didn't rea…
Are you using email marketing software? If not, you're missing out on effortless marketing and the reaching of desired conversion rates through email marketing software.
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…
Many of my clients call in with monstrous Gmail overloading issues with Outlook. A quick tip is to turn off the All Mail and Important folders from synching. Here is a quick video I made to show you how to turn off these and other folders in Gmail s…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question