Do you have your own email server or are you using another service like Yahoo! or Hotmail?
Those emails you are getting are likely hoaxes themselves. Do not reply to them.
It just depends on how the recipient has the spam blocker functions set. Some people have it pretty tight, even blocking all unknown addresses.
Some people can block all emails that are not on an approved list. If you are emails people who you have never email before this would cause some returns. Even if they email you first doesn’t mean that you can return the email.
Are you getting notices from addresses to which you have never sent e-mails? Perhaps some program is spoofing your address and sending out spam without your knowledge.
When I am using wireless away from home, I sometimes get a message I am blocked, due to spamming. It happens most often when I try to send a group message to 10 or more. I just wait a while and send the message to three people, then three more and so on.
My earthlink mail is constantly flagging my son’s emails to me as phishing.
Finally got it out of junk mail but now it’s in phishing.
No amount of tweaking helps but it does let me read the emails.
Most likley it’s not your address but the server or host sending the email. Most admins don’t block on an individual level they block on a server level. If the server you are using is on a blacklist then your mail can be flagged as SPAM and blocked.
In order to see if the server you are sending from is blacklisted go here:
http://www.mxtoolbox.com/
enter the domain name of your email address, thats everything to the right of the @ symbol, and press MX lookup. This will give you the IP address of the server you are using. Then go here:
http://www.mxtoolbox.com/blacklists.aspx
enter that IP address and press blacklist check. This will tell you if the server you are using is blacklisted anywhere. This system checks the biggest blacklists out there. About 31 of them.
If you are receiving messages that say your message was blocked and you never sent the message then most likley this is either a phishing attempt or someone is spoofing your return address in order to send out SPAM. Unfortunatley there is not a damn thing you can do about either of these.
If the return message you are getting says something about a Barrcudda server or your “reputation” let me know and i cna tell you how to get your email address whitelisted.
Are the blocked messages ones you actually sent?
I was getting undeliverable messages returned - not ones I had sent. Chinese spammers had captured my email and password. Changing the password alone was enough to stop it and my email has not been re-hijacked.