Mail delivery failed: returning message to sender

[technoid]

Hi, I keep getting "mail delivery failed" emails at my default email address, the address that came stock with my Siteground registration from the very beginning, afaik. The message is "Mail delivery failed: returning message to sender" and if I don't check this email on a weekly basis (because I don't use it), I can easily get hundreds to thousands of the same email. Right now, I haven't checked it in a few weeks and I already got 3500+ of this same email. I'm not sure how to contact SG, because the email support contact link only supports if you cannot receive/send emails etc. Should I use a spam filter? Or should I just delete this address? I don't know what would happen if I delete it since it came stock with my registration. It's the address without the @domain.

Anyway, I don't know why I get these emails. I think it is the after effect of spam? Help please?

[Val]

It seems that your account is being used for sending a lot of messages. The e-mail address without the @domain is your system mail account which is responsible for sending out (in most cases php) mails.

I can recommend you to check if all your applications are up to date. Additionally you can setup a filter to delete those messages without having you to login every now and then to clear them.