## page was copied from DnsTemplate
##master-page:HelpTemplate

<<Navigation(children,1)>>

<<TableOfContents()>>
https://www.csoonline.com/article/1269779/smtp-smuggling-enables-email-spoofing-while-passing-security-checks.html


{{{
SMTP smuggling enables email spoofing while passing security checks
}}}

== history ==
{{{
Outbound SMTP servers that don’t filter <CR>.<CR> and will allow outbound emails with this sequence inside 
include Outlook/Exchange Online, iCloud, on-premises Microsoft Exchange servers, 
Postfix, Sendmail, Startmail, Fastmail, and Zohomail.
}}}
----
CategoryDns CategoryWatch CategoryTemplate