help with encrypted attachments

[TropicalBound]

I was wondering what happened three weeks ago myself. Did the cert expire?

Do you have an email firewall on your Exchange Server? If the firewall cannot scan the attachments, it will usually strip them off (depending on how it's configured). See if white listing their domain in the firewall helps.

Do you have another email address they could send the encrypted attachments to? Hotmail, Yahoo, etc?

TB

[MishNY]

Approx 3 weeks ago we had a PC in the company with a spam bot detected. Their server had us blacklisted for about 3 days. The problem was resolved and we were whitelisted.

We do have an email firewall on the exchange server and they are white listed. I am able to receive attachments from them as long as they are not encrypted. It's only when they encrypt it is stripped.

I am thinking perhaps that number that doesn't exist on their certificates is the "private key"?