No, do give it a second thought. Spend a bit of time pondering how untrustworthy emails are and how suspicious you should be of them.
Email was invented when the internet was a simpler, safer place. The worst that was likely to happen was some mischievous nerdy computer students played a merry jape on you. Now it's the domain of spammers, scammers, phishers, bots and worse. It's a cesspit. Attempts to retro fit decent security onto email have been made but it's all a bit late now.