Spammers are constantly evolving their techniques to bypass anti-spam measures, such as utilizing botnets and image spam, making traditional methods less effective.
Effective anti-spam strategies like Bayesian filtering require regular training, which many end users may not find appealing, highlighting a challenge in maintaining their effectiveness.
Implementing SPF (Sender Policy Framework) alongside Bayesian filtering can enhance spam prevention by verifying the sending server's authenticity, but the adoption of SPF is relatively low despite its potential benefits.
Spammers can go to extreme lengths to disrupt anti-spam systems, such as overwhelming them with strange spam emails.
Technical challenges in dealing with spam, like a spam email causing a crucial software component to crash, require thorough investigation and debugging techniques.
In the ongoing battle against spam, spammers may resort to sacrificial tactics, like using spam emails to specifically target and disable anti-spam software.