minus-squareJiri Rybar@mastodonczech.cztoCybersecurity@fedia.io•Important reminder, if you own a domain name and don't use it for sending email.linkfedilinkarrow-up2·2 个月前@Jerry@hear-me.social @_elena@mastodon.social Thank you for sharing this. linkfedilink
@Jerry@hear-me.social @_elena@mastodon.social Thank you for sharing this.