I would like to report a problem we are having regarding DKIM verification. When DKIM is enabled for our domain, mail sent through the web interface is properly signed, but when mail is sent through the Thunderbird client it is not signed. The DKIM verifier plugin we use in Thunderbird shows DKIM : invalid (E-Mail was modified). We use POP3 protocol with Thunderbird.

At the current time we have disabled DKIM signing for our domain. Please be kind to help us with this problem. We do not know if this is a problem with Zoho or with Thunderbird.