IIS 5 & IIS 6
Emails sent from pickup directory are recognized as SPAM
Last post Feb 16, 2008 06:29 AM by qbernard
Feb 15, 2008 07:50 AM|edtee|LINK
I use IIS SMTP Pickup directory for my ASP.NET emails. The problem is it goes to recipients' (Yahoo in particular) junk/spam mailboxes. Can anyone help me solve this spam issue?
Reverse DNS is fine. My MX records though point to google since our emails are hosted there. Any clues?
Feb 15, 2008 01:18 PMfirstname.lastname@example.org|LINK
Most likely it's not related to the pickup folder, or anything else on your system. Your MX records might make a difference, having a SPF record can help and even the IP range you're coming from can make a difference. Even the registration length of the
domain can be used to determine legitimacy.
Feb 15, 2008 04:31 PM|edtee|LINK
I'll try adding another MX record to our host name and see how it goes.
Feb 15, 2008 09:04 PMemail@example.com|LINK
Check the SMTP logs and see what the connection to Yahoo is doing.
Feb 16, 2008 05:22 AM|edtee|LINK
Mails coming from our server are deferred! This is not good. I'm trying to contact Yahoo support to help us out on this.
Great tip on looking up the logs, I totally forgot about this.
What else can I do besides waiting for Yahoo support? Reverse DNS (Check), MX Record (Check), Don't do bulk mail (Check), don't know what else is possible. Domain Keys perhaps?
Feb 16, 2008 05:24 AM|Qbernard|LINK
I think you got most covered, also check if your server is blacklisted by spamcop etc
Feb 16, 2008 05:38 AM|edtee|LINK
It's not listed so we should be fine (technically).
Is it possible to do DomainKeys in IIS?
Feb 16, 2008 06:29 AM|Qbernard|LINK
DomainKeys ? doubt so with IIS SMTP.