Am 29.09.2014 um 15:01 schrieb Reindl Harald: > Am 29.09.2014 um 14:53 schrieb Michael Wechner: >> which means using telnet returns > > telnet is worthless because AUTH is likely announced *after STARTTLS* > http://www.postfix.org/postconf.5.html#smtp_sasl_security_options > >> telnet mx2.wyona.com 587 >> Trying 50.116.54.197... >> Connected to node3.wyona.com. >> Escape character is '^]'. >> 220 node3.members.linode.com ESMTP Postfix (Ubuntu) > > oh my god, another server in the linode-zombie network > that's bad neigbourhood and you should avoid a PTR > ending with "members.linode.com" which is generic > and here blocked because i have never seen any legit > mail from Linode but 24 hours each day attacks or > spam delivery attempts > > http://www.mxpolice.com/email-security/importance-of-ptr-records-for-reliable-mail-delivery/
errata, with "node" at the begin: luck
/^li[0-9]{1,3}[\.\-][0-9]{1,3}\.members\.linode\.com$/ REJECT Generic
DNS-Reverse-Lookup
>> EHLO letscallitevil.com
>> 250-node3.members.linode.com
>> 250-PIPELINING
>> 250-SIZE 10240000
>> 250-VRFY
>> 250-ETRN
>> 250-STARTTLS
>> 250-ENHANCEDSTATUSCODES
>> 250-8BITMIME
>> 250 DSN
signature.asc
Description: OpenPGP digital signature
