sending email with hyperlinks and email addresses enclosed.

Posted on 2011-03-11
Last Modified: 2012-06-22
This is just wierd.

I have an asp page set up that send out email through a smtp server. All of a sudden, it stopped working.

Testing has revealed this.

I have 3 accounts I've tested with.
and a network solutions hosted account.

We've determined that if I send a message that contains stuff like

Applicant Email:

The message fails to be delivered. But

If I strip out the email address, it gets delivered.

I've used the smtp servers at, network solutions, and another 3rd part and in all cases, the message didn't go through and get delivered.

Is it possible they are all using the same blacklist, possible, but highly unlikely?

Any thoughts?
Question by:kblackwel
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LVL 11

Assisted Solution

yarwell earned 250 total points
ID: 35115608
Not a blacklist but a content filter perhaps ?

You need to analyse the error message, it may be the recipient that is bouncing it not the SMTP server.
LVL 14

Assisted Solution

by:Ehab Salem
Ehab Salem earned 250 total points
ID: 35120825
Agree with yarwell, the '.com' is usually blocked in content filtering systems.

Accepted Solution

kblackwel earned 0 total points
ID: 35122041
There are no bounce messages. Just never gets delivered
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LVL 11

Expert Comment

ID: 35122082
must be client end filtering if not delivered to end user, may be sat in spam bin somewhere ? SMTP rejection would generate either a bounce or a failure message, though these may be themselves blocked as an anti-spam measure.

The recipient is the common factor in your description of the problem.

Author Comment

ID: 35122103
Nope. I have access to all three accounts. Just never comes over. In my smtp client ( used popcorn for testing) smtp sending logs say it went out. Checked all 3 accounts in all folders. No delivery. But that does not mean netsol and yahoo aren't doing it at server level I guess.
LVL 14

Expert Comment

by:Ehab Salem
ID: 35125645
Maybe it is blocked at the recipient's side, and if your antispam is configured not to return NDR it won't.

Author Comment

ID: 35130722
For testing purposes, I'm the sender and the receiver. Now if there is something behind the scenes filtering the message, I don't know. But they are not being delivereda and there's no bounces or anything else in the smtp message log.

They are  just disappearing.

Author Closing Comment

ID: 35503337
Both assisted

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