IMAP temporarily blocks

IMAP temporarily blocks

Good morning,

Since 2 months we use Zoho mail, because it provides additional security. I have to admitt, more spam is trapped into the spam filter. So far so good. However, I face a l ot of IMAP temporarily blocks. In the beginning with my laptop and iPad. Recent weeks it was not to bad, but now I can not retrieve my mail on my android phone. Today again a problem on my laptop. It is really annoying. Please can you help. I think it is not so special that people do check mail on their laptop, iPad and mobile phone is it?  I am a dummy in this sort of thing, so please try to explain in simple language what is going on (:-)) and more important how to solve this problem.

Regards Louis