I work with a company often sending me emails with attachments.

Recently attachments (PDF and Word) were removed when I downloaded the emails from one employee of said company. He has a banner in his email, which was also gone.

I am using Pop Peeper where I was able to note that the attachments were on the mail server of my provider but when downloading the emails with Outlook Express the attached files had disappeared.

I then asked another employee of same company to send the same files with the same attachments and they all arrived safely in my mailbox.

I have checked that the specific sender is not blocked in OE.

It should be added that the first employee also sent same email with attachments to another email address of mine, where attached files went all the way through to my mailbox.

I only have a problem with that specific sender.

ZoneAlarm details:
ZoneAlarm version: 10.0.241.000
vsmon version: 10.0.241.000
Driver version: 10.0.241.000
Anti-virus engine version: 8.1.8.79
Anti-virus signature DAT file version: 1060658336
ZoneAlarm Browser Security: 1.5.311.0
ZoneAlarm ForceField Spyware Scanner: 1.5.53.235
ZoneAlarm ForceField Anti-Phishing Database: 1.2.104.0
ZoneAlarm ForceField Spyware Sites Database: 04.155

My OS is WIN XP SP3.

Does anyone have experienced same problem and found a solution?

Best regards
Mariola