Am 29.09.2014 um 14:53 schrieb Michael Wechner:
I have installed the package dovecot-postfix on Ubuntu 12.04 LTS:
dovecot --version: 2.0.19 postconf -d | grep version: 2.9.6
and receiving email works very fine, but relaying email does not work.
I think the problem is that after STARTTLS the authentication is not being executed
250-AUTH PLAIN 250-AUTH=PLAIN
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-reliabl...
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