Generic or misleading news titles
The title of the message should be specific and clear. Vague phrases like "You just won!" or "Buy now!" will only get you in trouble. Write the message first, and then, based on the content, come up with a title that is not confusing or unclear.
For example, if you want to send your subscribers an email about new products in your online store, a good and clear subject line should sound something like this: "Check out the new products you'll love."
This subject line is still marketing and engaging, but the recipient knows what to expect. It's a much better solution than "Shop Now! Hot Deals!"
Finally, your emails should be linguistically and grammatically correct. Poor Polish and typos are another serious red flag for anti-spam algorithms. Check every message before sending (ideally twice). You can use many available grammar checkers. Some of them (e.g. Language Tools) are available for free.
Make sure your language is easy for your audience to understand (don't overdo it with fancy or eloquent terms) and free of typos and other errors.
Tip:
If you are not sure whether your email is good from the perspective of anti-spam chinese overseas asia database filters, paste it into ChataGPT and ask for its verification. This way you will check whether your email:
sounds natural in the chosen language,
is correct,
does not contain any risky words and phrases.
You can do it for free, you don't need a paid plan to verify your message with ChataGPT.