We have a
forum for this.
No, e-mails are normally harmless when they're being displayed in your reader, unless there's been announcement of that reader having been compromised somehow (which is VERY VERY rare, and I don't think it's
ever happened in recent years). If your mail program's vendor's site doesn't show anything, there should be no harm.
E-mail is just text, after all, and I don't know of a single mail client that automatically opens potentially harmful attachments.