0
votes
0answers
12 views

Local SMTP Server — prevent spam flag?

I opened up port 25 on my router, so now I can use sendmail to send email. However, the emails I send are being marked as spam by my personal gmail account (understandably). The "from" field defaults ...
0
votes
0answers
56 views

Blocking or filtering chinese spam using postfix

My mail server runs postfix, spamassassin, amavis and sieve. Using a combination of any of these, is it possible to block or tag any mail I receive that is written in non-"English" characters? I.e ...
1
vote
1answer
179 views

Postfix is Sending Spam [closed]

I have an Ubuntu 12.04 server, hosted on AWS, that powers a dozen WordPress installations using Nginx and php5-fpm. The problem just began one day. My server was down. Panic! Whenever I turned it on ...
0
votes
1answer
56 views

DKIM configuration on Debian

Due to the fact that many e-mails we send with our company address do not get delivered, rejected or marked as spam, I searched for a solution on the web. One of the solutions I found was to use DKIM ...
1
vote
0answers
162 views

Configure Ubuntu Server VPS to send mail without going to spam

I have installed and configured Postfix on a VPS. I have managed to get it so I can send and receive mail. However every time I send mail from It, it get's marked as spam and was wondering how I ...
0
votes
1answer
167 views

How do I enable DKIM for bounce messages in Postfix

I have set up a linux email server with Postfix and have correctly set up SPF and DKIM. When I send an email, the email is signed properly, and when I view the source from the receiving client (such ...
1
vote
1answer
189 views

postfix: block mails to a specific and non existent mail address

How could I block mail to an incoming address that spammers are hammering via postfix? I have a webmin interface to postfix, so if this can be done via webmin interface that would be great.
2
votes
1answer
978 views

Securing smtp with login

I have a ispconfig server, and it seems that someone is using it to send spam. I got about 130 "Mail Delivery System" email about declined send email. This spammer uses my email address as sent from ...