Today I received 1500 emails bounced back from different servers because some spammer is using my email address to send spam. What can I do to fix this? I used to NEVER get spam (I have an obscure domain suffix), but now I get it daily and it looks like its always from the same people. I am using the Windows shared hosting plan. I am not sure where to start to fix this.
You need to add an SPF record to make the bounces more limited job jobbing is quite common 
OK I enabled SPF and I disabled the catch-all and it seems to be “fixed” now.
BTW all this stuff is coming from one single spammer in China selling penis pills.