Subadressing: Addresses of the form something-filter@example.com, using various separators between the base name and the tag, are supported by several email services, including Andrew Project (plus),[16] Runbox (plus), Gmail (plus),[17] Rackspace (plus), Yahoo! Mail Plus (hyphen),[18] Apple's iCloud (plus), Outlook.com (plus),[19] Proton Mail (plus),[20] Fastmail (plus and Subdomain Addressing),[21] postale.io (plus),[22] Pobox (plus),[23] MeMail (plus),[24] MMDF (equals), Qmail and Courier Mail Server (hyphen).[25][26] Postfix and Exim allow configuring an arbitrary separator from the legal character set.[27][28]
Thanks that's exactly what I was loooking for
en.wikipedia.org/wiki/Email_addres...