I'm not sure which component is responsible for that behaviour, so please change an assign if necessary.

In 'Update viewer' in a change description window where no description is available a changelog from RPM package (SPEC file) is printed. When there is antispam email address used (which is very common since SPEC file are usually available on the net in as a plan text) an error is displayed (instead of a changelog):

The developer logs will be shown as no description is available for this update:
Could not parse header: 'Foo Bar <foo.foo[AT]bar.com>', expected: 'Firstname Lastname <email@account.com> - version-release'

In my opinion regexp could be simplified to detect email part as <*>, not necessary with '@' and at least one '.'.