Haringey staff blocking the public from emailing them

Over the last year or so I have emailed various people at Haringey about various issues (roads, parks, refuse etc). I have noticed that after a few emails back and forth, suddenly I start getting emails bounced back from the person which say the following:

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Delivery has failed to these recipients or groups:

xxxx.xxxx@haringey.gov.uk
Your message is too large to send. To send it, make the message smaller, for example, by removing attachments.

The maximum message size that's allowed is 1 KB. This message is 609 KB.

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At first I thought this was a glitch their their IT/email system, but I have come to realise that this is what Haringey do when they want to "block" someone and stop engaging, as it's impossible to make any email that's less than 1kb in size.

This is a pretty shoddy way to communicate with the public.

Has anyone else had this issue?