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34
votes
6answers
60k 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 ...
0
votes
2answers
182 views

Using spamassassin as an external filter for a web forum

Has anyone tried anything like this? My plan is to do something like this: When a forum post is submitted, instead of immediately saving it to the database, send an e-mail to a reserved account. ...
3
votes
4answers
441 views

Hosted Anti-Spam Service vs. Anti-Spam Appliance

We're currently using Content Catcher, a hosted spam solution. For less than what we pay them per year, we could purchase an anti-spam appliance to run in house. From a simple dollar perspective, it ...
0
votes
2answers
750 views

Exchange 2003 not processing some email marked as spam by Brightmail

Environment: Exchange 2003 Front-end server running Brightmail 6 Exchange 2003 Back-end server with mail stores etc. Spam is properly tagged by brightmail in header with flag 'X-bmifolder: 1' In ...
21
votes
4answers
5k views

Best Practices for preventing you from looking like a spammer [duplicate]

I'd like to feel more confident setting up mail for my clients with regards to false positives. Here's what I know: SPF records are good, but not every spam filter service/software (SFSS) uses ...
1
vote
5answers
496 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 ...
3
votes
4answers
9k views

Message Queue building on Barracuda Spam Firewall

I have just installed our new Spam Firewall, and all seemed well. But the Spam Firewall has now decided to put all mail in a message queue and I have no idea how to force it on or anything as there ...
2
votes
1answer
1k views

Setting up a Barracuda Spam Filter

We have just purchased a Barracuda Spam Firewall 300, we have set it up but are having problems authenticating with our Exchange server (2007). I spoke to Barracuda about it and they said I need to ...
0
votes
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 ...
2
votes
3answers
9k views

Outlook - Junk Email - Add an email to the safe senders for entire company?

We've got an internal web based system that emails out reports on a regular basis. The emails are sent as: internalsystem@thecompanyIworkfor.com and the body of the email has a bunch of data and some ...
0
votes
2answers
145 views

how to enable bounceback on internet facing linux email relay w/ Exchange 2000 backend

I have to use a Win2k/Exchange 2k setup for our companies mail. There is no way to change or upgrade that. Due to various hacking & spam scenarios that played out, we implemented a linux based ...
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 ...
2
votes
3answers
874 views

How do you configure sendmail to reject Email with a Date header too far from real time?

A friend of mine using (I believe) qmail has it configured to reject, as SPAM, any incoming Email with a Date: header that is too far from real time. I can't figure out how to do this with sendmail. ...