Sending 50 emails per day is generally considered a moderate volume of emails, and it may or may not be considered a lot depending on the factors.
If you have a good domain reputation, are within the rate limits imposed by your email service provider, and are sending high-quality and relevant emails, it is possible that 50 emails per day could be an effective and successful volume for your cold emailing campaign.
However, if any of these factors are not in place, it is possible that sending 50 emails per day could lead to a high number of bounces, spam complaints, and unsubscribes, which could harm your domain reputation and make it difficult to effectively reach out to potential customers and clients.