Comment on Hotels in Europe to sue Booking.com over 'abusive' practicesparentComments−mtmail1yDo many websites support email address with ip literals? john@12.34.56.78 ? I haven't seen such email addresses in years.−sylware1yAny competent sysadmin will handle those, with serious software, ofc.That said, this standard format is:mailbox@[x.x.x.x] and mailbox@[ipv6:...]−sylware1yI forgot: for obvious reasons, those emails are stronger than SPF since there is a direct correlation between the email address and the smtp server.
Comments
Do many websites support email address with ip literals? john@12.34.56.78 ? I haven't seen such email addresses in years.
Any competent sysadmin will handle those, with serious software, ofc.
That said, this standard format is:
mailbox@[x.x.x.x] and mailbox@[ipv6:...]
I forgot: for obvious reasons, those emails are stronger than SPF since there is a direct correlation between the email address and the smtp server.