0
votes
1answer
41 views

Add a per-domain filter in sieve

How can I set up a per-domain filter in sieve/dovecot? In documentation I can see per-user setting: sieve = ~/.dovecot.sieve, and right now I'm using global filter: sieve_before = ...
1
vote
1answer
87 views

Assistance on why email is being marked as spam [duplicate]

We are trying to send out a mass email for a client of ours through a third party sender and it is always being sent to the spam folder rather than the inbox. I have below the headers from the email. ...
-1
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3answers
175 views

Are there spam filters that check email headers?

Are there spam filtering technologies that examine email headers? For example; X-PHP-Origin header can contain an IP address that is on a blacklist; are there spam filters that would catch this? I ...
-3
votes
1answer
96 views

Blocking unsubscribe spam

I have SpamAssassin turned on and using RBL in the WHM control panel using the lists from spamhaus. However, these type of e-mails are getting in. Are there any ways to stop them? Example of the ...
1
vote
2answers
162 views

How Reverse DNS does what it does

Hopefully this is not a stupid question, but I cannot find a clear cut answer. Can someone please inform me exactly what 'source address' is used in Reverse DNS? Does rDNS pull the IP address from ...
0
votes
2answers
122 views

DNS: MX listing points to google apps and A listing to my own server. Can I send emails from my own server without being classified as spam?

Linux DNS networking question: If an MX record points to IP address 111.111.111.111 and A record of a domain points to 222.222.222.222, can I still send emails from 222.222.222.222 on the behalf of a ...
7
votes
2answers
2k views

GMail suspects confirmation email in stealing personal information

When user registers on my web site, web site sends user email confirmation link. Subject: Please confirm your email address Body:Please open this link in your browser to confirm your email address: ...
5
votes
3answers
4k views

Why does gmail flag my server emails as spam?

I recently moved my server to a new slice at slicehost and since, gmail has been flagging my email as spam. I have added domain keys, created a SPF record, have reverse dns setup, and my ip is not ...
2
votes
4answers
1k views

Best practices for spam filtering

I've been running an amavisd-new, spamassassin, postfix setup for a while to help crush spam on our incoming e-mail servers. The setup I'm using is a few years old at this point and its about time to ...
2
votes
1answer
129 views

Outgoing emails from China based VPS rejected or marked as spam

I just switched email service provider from Google apps to a VPS with a Hong Kong host. Now I find a huge part of all outgoing emails ending up in spam boxes and in some cases getting totally rejected ...
3
votes
3answers
147 views

Do mail servers and/or spam filters care about a domain's root A record?

I have a domain which I only use for email adresses. I don't host any content there. My provider added an initial A record at the root of my domain which points to a server that delivers a ...
2
votes
2answers
172 views

Best techniques to make sure that emails are not marked as spam

We have a service that requires a registration and the registration process sends some confirmation emails. These emails say in a three-line message that you have to click some link with a generated ...
1
vote
2answers
157 views

would this header cause the email to be flagged as suspect?

Authentication-Results: [snip].mail.[snip].[snip].com from=someDomain.com; domainkeys=neutral (no sig); from=someDomain.com; dkim=neutral (no sig) Received: from 127.0.0.1 (EHLO ...
1
vote
2answers
1k views

Configure postfix to filter email into hold queue

I would like postfix to send all emails received on SMTP off to an external process, which will decide whether to allow them through as normal, or whether to put them into the hold queue (or another ...
0
votes
1answer
313 views

Exchange 2007 Content Filter is being to aggressive

Some senders are getting the following return message: Error transferring to mail.server.com; SMTP Protocol Returned a Permanent Error 550 5.7.1 Message rejected as spam by Content Filtering. ...
2
votes
5answers
876 views

How to configure email server to send lots of transactional emails

My organization is currently outsourcing email delivery to an SMTP service provider. We're considering bringing that back in house to deliver our own emails. We send about 5k transaction emails per ...
1
vote
3answers
614 views

how to stop outgoing email spam

running an email system using roundcube, with about 200 people using it. 99% of them do as they are told and only email clients they have already spoken to, however 1% of them decide to bulk spam bcc ...
1
vote
1answer
265 views

Where/How Can Spam False Positives Be Reported To MessageLabs?

An email I sent got flagged as spam by MessageLabs on the recipient side. I'd like to proactively engage MessageLabs to tell me more about why this got quarantined (or at least fix it). Is there ...
1
vote
2answers
68 views

Users accessing our email when traveling overseas are seeing strange SPAM behavior

I run technology for an international non-profit, so I have users that could be checking their email from Pennsylvania one day, Santo Domingo the next, and Kabul, Afghanistan, the next week. Recently, ...
0
votes
2answers
80 views

Trust e-mail from our domain(s)

We have several notification e-mails that get generated by various systems for our users. I've been asked to make sure all e-mail to [anything]@ourcompany.com doesn't wind up in our users' junk ...
2
votes
4answers
212 views

Does sending e-mail in the name of customers increase the risk of being marked as spammer?

We are developing a SaaS website application that lets users send invoices to their clients. Ideally, these e-mails should appear to be originating from our customers, so the sender e-mail address ...
0
votes
1answer
1k views

Linux Exim set return-path header automaticly using from header

I use Exim on a Centos distribution and have some problems with the mail sending. In order to make all the email pass the spam filters the "Return-path" and "Sender" headers have to be attached to ...
0
votes
2answers
90 views

Why is our spamfiltering software client crazy?

What to do? It blocks almost all incoming messages. What to do? It complains about: RDNS_NONE - a host with no rDNS? What is that? BAD_ENC_HEADER FH_DATE_PAS_20XX What does these rules mean ...
2
votes
1answer
370 views

Desperation: All FIVE of my Postini clients' accounts have been deactivated

Note: This is re-telling of a message I just posted to Google's support forums. Well, this week has not been good. I have five clients on Postini. All of the clients accounts were purchased ...
0
votes
2answers
75 views

Help with SPF and Wacky Setup

I am the new system administrator for a company who recently rebranded one of its products. We seem to be having some trouble with our messages being marked as SPAM and from the research I have done, ...
0
votes
3answers
259 views

Exchange 2007 ineffective spam filter

On a pretty clean 2007 setup, I'm seeing A LOT of mail with senders such as 0.0011a7f8@roman htyme@14009d3cb93848c 0-lz@14009d3cb93848c 0-5-1@home-4fd909062d 0-td@h109-187-48-125.dyn.bashtel.ru all ...
1
vote
2answers
269 views

Why are default spamassassin rules not being applied to emails we generate?

My company uses a standalone spam-assassin install to test marketing emails, however, mail originating from us does not seem to run the full gamut of test. For example, Spam assassin has a default ...
0
votes
2answers
348 views

spamassassin --lint and spamc return different scores

I'll keep this short and sweet. spamassassin --lint -D < email_message_to_test.eml Returns: [22154] dbg: check: is spam? score=4.205 required=5 Which is an entirely reasonable score, it is in fact ...
0
votes
3answers
435 views

Testing promotions against spamassassin, scores lower than expected

I recently setup a local installation of spam assassin for testing promotions as we want to catch any spam false positives before we mail our customers (This email is opt-in). We even added several ...
1
vote
4answers
5k views

Filtering spam to an IMAP folder with postfix, policyd and amavis?

Using amavisd-new, I'm successfully marking multiple headers and accurately reporting most spam. However, right now I'm delivering it to the inbox and I would like to have a Junk folder instead. ...
0
votes
1answer
719 views

Whitelist an address in Trend IMSS 5.7

Trying to whitelist an incoming address in Trend IMSS v5 - in practice, emails from this address will have an attachment & we want the message / attachment to bypass the existing 'executable ...
25
votes
6answers
36k views

How to send emails and avoid them being classified as spam

This is a canonical question about how to handle email sent from your server being misclassified as spam. For additional information you may find these similar questions helpful: Best ...
1
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5answers
481 views

DNSBL - Email Servers Spam

I'm currently doing research on a better way for emailing customers our news letter and not using an ESP such as vertical response since most users there use purchase list and ruin the shared IPs for ...
0
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2answers
92 views

Is This Feasible - Running MailWash on a dedicated machine to pre-check

Is This Feasible - Running MailWash on a dedicated machine to pre-check 80-100 email accounts before end-users check with Outlook? We have some major SPAM issues at my company with some users ...
3
votes
8answers
2k views

Block spam by using geoip filter?

We are looking for a way to be able to block spam based on geographic location by filtering using geoip. context: we rarely have any email correspondence outside of the USA, so we would like to block ...