The consensus is that 'spam' is primarily used as an uncountable noun when referring to unsolicited electronic messages in general. However, it can also function as a countable noun, particularly when referring to specific instances, types, or categories of spam. Usage of the plural form 'spams' is more common in informal contexts or when distinguishing between different kinds of spam. Native language speakers, such as those from German-speaking regions, often avoid using 'spams.' Dictionaries like Merriam-Webster and Grammarly explicitly recognize both countable and uncountable usages.