oh, and I’m using the latest WP version with no plugins, only wp super cache
may be more than 20,000 visitors each day, then why
you can contact the hosting
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Are you on a shared, VPS, reseller, or dedicated server account with your host?
If shared hosting>
you are having more than 20K in visitors, and possibly on a shared client… you might be using more resources than alloted for a webhost. I know from experience that Dreamhost would terminate or suspend accounts as such as I hosted a site one time that had this much in unique visitors per day.
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You might possibly be a victim of spammers. It happens. I am tempted to ask what site drives this much traffic. Does your Google Analytics and Alexa rank correspond somewhat with what your bandwidth is taking up.
BTW, Coppermine has been notoriously known to be infiltrated by spammers, even if you have it on moderated mode… kind of along the same line as phpbb as well.
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Possibly other guesses:
How many plugins do you use?
How many images do you have uploaded into your WP?
What kind of contact form do you use?
Who hosts you? – some hosts may be unsecure and I know a few from past experience.
Is anyone direct linking your images on your site?
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Do you get a lot of email if you use an email from your domain and a lot of it is spammers?
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Have you analyzed with anything like Google Analytics or StatPress or WordPress stats on what or who visits your website, and what they are accessing?
Hey, thank you for your answer.
I got a dedicated server via server2sale.com
I have no images uploaded at WordPress, no plugins, no contact form (actually nothing besides news), I even upload news images on tinypic.com
Maybe indeed spammers are the problem? I delete tons of spam from comments, but how could they attack my site when comments are offline?
If you have a dedicated server, is it WHM (cPanel)? If so, there is a section in the sidebar about email and your mail queue. If it is a high amount… yep, you have spammers.
If not, or you prefer someone to look at it, ask your webhost to look into that and see if you are having an issue…. and fix it so you do not run into too many issues.