Jak se poznají ty správné IP adresy pro posílání e-mailů nebo kde se žádá o štempl, aby adresa mohla posílat e-mail?
To jako existuje podniková verze ip adresy?
Ne, ale customer-adresy vcelku snadno poznáš dle toho, že postrádají rDNS, nebo mají rDNS zjevně vygenerované ze samotné IP adresy.
Například postfix iRedMailu se s těmito IP adresami vypořádává takto:
# Reject adsl spammers.
#
# match word `adsl` with word boundary `\b`.
/(\badsl\b)/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
# bypass "[IP_ADDRESS]"
/^\[(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\]$/ DUNNO
# bypass some HELOs which contains IP address
/^o\d{1,3}-\d{1,3}-\d{1,3}-\d{1,3}\.outbound-mail\.sendgrid\.net$/ DUNNO
# reject HELO which contains IP address
/(\d{1,3}[\.-]\d{1,3}[\.-]\d{1,3}[\.-]\d{1,3})/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(\d{1,3}\.ip\.-\d{1,3}-\d{1,3}-\d{1,3}\.eu)/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(pppoe)/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(dsl\.brasiltelecom\.net\.br)/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(dsl\.optinet\.hr)/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(dsl\.telesp\.net\.br)/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(dialup)/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(dhcp)/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(static-pool-[\d\.-]*\.flagman\.zp\.ua)$/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(speedy\.com\.ar)$/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(speedyterra\.com\.br)$/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(static\.sbb\.rs)$/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
/(static\.vsnl\.net\.in)$/ REJECT ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (${1})
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