Thanks for the suggestion Aderoy!!

Hi there!!

I use Pegasus for 100's of years now but something really weird is happening lately.
One of my clients reported that she was not getting my emails... We communicate for many years and I never had any problems before.
I then send a TEST email to her, to a mail.com address and to my own email address at my domain's mail server.

She didn't get hers and the one to mail.com never got there but the one to my own domain did!! Then I've used another application I have to send newsletters and both the mail.com and my domain received the test email..

My isp's SMTP is mail.iinet.net.au and pegasus uses port 25. I don't get any error messages and the emails appear on my copyself folder.

I have no idea why Pegasus send emails to some addresses but not others and that has undermined my confidence that people are actually getting my emails!!

Does anyone have any clues???

Thanks!!
Cheers! 

> I have no idea why Pegasus send emails to some addresses but not
> others and that has undermined my confidence that people are actually
> getting my emails!!
>
> Does anyone have any clues???

Might be an anti-virus/Spam problem.  Go to File | Network configuration | General and turn on "Create Internet session logs (advanced diagnostic use only)"  

Checking this control tells Pegasus Mail to create special log files that show the entire exchange of information between it and the servers it connects to. Each session will be created in a file called TCPxxxx.WPM in your home mailbox directory (the "xxxx" is replaced by four digits). Creating session logs will slow down the performance of your system somewhat, and you should be aware that any username and password information exchanged between Pegasus Mail and the server will be shown in the log, *even* if you use SSL to secure the connection. Session logs are primarily useful if you need to debug a problem between Pegasus Mail and one of the servers it connects to - you should enable the option only on instructions from a system administrator or from Pegasus Mail technical support. [ Technical note: this control has the same effect as using a "-Z 32" commandline switch when you run Pegasus Mail ]

You can now try again to send the mail this account again and then look at the resulting TCP/IP debug file.  Review of this file will tell you exactly what is going on between WinPMail and the server. You can send me a copy of the session log for analysis if you wish.

If the mail is properly received by the relay host this this may be a problem with the relay host being on a blacklist.  FWIW though I could not find it on any blacklist.

Could be at the receiving end - new spam filter or hardware spam filter (Barracuda). It could have blocked the domain. This is if going to a business or school, if to web mail address check aggressive spam filtering.