Am 29.01.2015 um 20:10 schrieb Noel Jones: > On 1/29/2015 12:46 PM, Aravindhan wrote: >> I have installed postfix mail server in ubuntu machine. I configured the mail >> server as well as DNS properly. >> >> Mails are sent from our mail server properly, but all the mails are listed >> in the spam folder(in Yahoo & Outlook). It is listing properly in the inbox >> in Gmail. >> >> I have implemented the following methodologies to prevent the SPAM, which is >> as follows, >> >> * SPF >> * DKIM >> * Domain Keys >> >> After the above implementation, Headers of the email is as follows, >> >> Authentication-Results: hotmail.com; spf=pass (sender IP is >> xx.xx.xx.xx) >> smtp.mailfrom=t...@maildomain.com; dkim=pass header.d=maildomain.com; >> x-hmca=pass >> header.id=t...@maildomain.com >> DomainKey-Signature: a=rsa-sha1; s=mail; d=maildomain.com; c=simple; >> q=dns; >> b=key >> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; >> d=maildomain.com;s=mail; >> t=1422532895;bh=W+pft8+RS+1CGEuNXIA20Br1EeZE1qaANUx3o6nvb3E=;h=From: >> To:Subject:From;b=key >> >> I have checked the several email testing service to detect why our emails >> are marked as spam and the result is as follows, >> >> * Sent the mail to the "check-a...@verifier.port25.com" and got >> the authentication report mail. >> ========================================================== >> Summary of Results >> ========================================================== >> SPF check: pass >> DomainKeys check: pass >> DKIM check: pass >> Sender-ID check: pass >> SpamAssassin check: ham >> >> * Tested the email with "https://www.mail-tester.com/"; and got the score >> "9.3/10". >> >> * Checked our mail server IP address in >> "http://whatismyipaddress.com/blacklist-check"; and our IP address is >> not blacklisted. >> >> Note: >> >> * Mailserver hosted in Amazon EC2 instance with a static IP address (connect >> to internet, and all traffic ports are opened for inbound and outbound in >> security groups). >> >> * Mail sending service limit has been increased properly(Support query has >> been raised to amazon and the mail restriction has been removed in our >> account). >> >> * I am using self signed certificate in my Mail server. >> >> Can any one let us know, how to prevent the email sent as spam. Is there >> anything, we need to look into our mail server configuration? > > > Sounds as if you're doing every thing right. Make sure your IP has > correct FCrDNS. Looks as if your SPF and DKIM are working. Does > anyone still use DomainKeys? Not sure that adds any value. > > Some of the freemail providers will spam-tag perfect mail from new > domains and/or new IP addresses, especially if a "large" amount of > mail shows up from that new domain or IP. For some undefined value > of large. > > See if you can sign up for the bulk mail feedback loop or whatever > bulk sender programs they might have at hotmail or yahoo. Only the > receiving system can answer why some specific mail was marked as > spam, all we can do is guess. > > > > > -- Noel Jones >
just one more idea add a dmarc policy, i think there is a "whitelist" feature at yahoo Best Regards MfG Robert Schetterer -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein
