How tofix the error of sending and receiving an email in Optimum Email? If you are using an Optimum Email account to send and receive the email then it might be a possibility that you may face an error while sending and receiving emails and for that, you need some help to get the solution. Here you can get the complete process and you are required to just follow it in a proper manner. By doing so you will be able to rectify the issue and if even then you could not resolve the issue and face some error in any step then there is another option for you in the form of Optimum Email technical Support Number where skilled experts will assist you in resolving the issue. The main cause of the error- What Is Port 25 and why is it being blocked? The reason behind the error might be the blocking of port 25 by the internet service provider as a precautionary step in order to stop the spam and other malware emails. Due to that, you will be able to send and receive the emails so you