It’s not uncommon to experience an uptick in spam emails, and the presence of bizarre or random strings of characters as email sender names is a tactic often used by spammers. This approach helps them navigate through filters that block spam based on more commonly used keywords or entities.

Several reasons could lead to an increase in such spam messages:
Robust Spam Filters: Spammers continually adapt to more advanced predictive filters by using unconventional names. Their intention is to slip past filters that are typically set up to catch standard keywords, known spam domains, or frequent scam patterns.
Bot Evolution: Spamming bots and automated systems are becoming more sophisticated. They may algorithmically generate random strings to create email accounts that seem more legitimate but defy detection criteria used by filters.
Data Breaches: If your email was part of a data breach, it could be circulating within spammer networks, triggering an increase in the number of unwanted messages you receive.
Global Spam Trends: Spikes in email phishing campaigns can cause a global increase in spam, as evidenced by mass reports from email users around the world.

To manage the situation better, consider these steps:
Regular Monitoring: Keep updating and reviewing the settings of your email’s spam filters. Ensure they’re configured to catch inconsistencies or behavior indicative of spam.
Multi-layered Security: Use additional security measures like email security solutions or plugins/services that provide more thorough scanning and filtering.
Awareness and Reporting: Stay informed about phishing and spam techniques. Report spam emails to your email provider, as this can help improve the accuracy of their filtering algorithms.
Data Security: Regularly update passwords and enable multi-factor authentication wherever possible to mitigate damage from data breaches.

By understanding these factors and taking proactive measures, you can reduce the impact of spam in your email inbox.