It looks like Vendelux.com is flagged in at least one SPAM database, see https://mxtoolbox.com/SuperTool.aspx?action=mx%3avendelux.com

As reported from https://www.virustotal.com, your website contains the following metadata:descriptionUnvaccinated dating & friendship for covid unvaxxed unjabbed adult singles, men and women. keywordsunvaccinated, unvaxxed, unjabbed, dating, dating, ...