All Questions
Tagged with spam-prevention postfix
14
questions with no upvoted or accepted answers
1
vote
0
answers
26
views
How to prioritise one domain name over others in rDNS?
I have a single remote server and multiple domain names. This server hosts webpages under certain domain names - say domain1.com - and hosts a webpage with an associated mail server under a separate ...
- 33
1
vote
0
answers
106
views
Debian server getting spammed through
This server has been live for many years, however, recently it is under attack by spam.
I have not been able to plug the hole they are using. It seems that the spam is using the sasl_username=clamav.
...
- 11
1
vote
0
answers
450
views
header_checks is applied to mail body (CentOS 7 + Postfix 2.10.1)
I have received SPAM e-mail, added regular expression to header_checks about it and when tried to forward SPAM e-mail as attachment, then this check triggered and rejected my forwarded e-mail.
Regexp ...
- 317
1
vote
0
answers
133
views
Postfix is forwarding/relaying spam
I have an Ubuntu 16.04 machine with Postfix 3.1.0 and virtual mailboxes (iredmail).
I'm using postscreen (with a local Bind server), Amavis with ClamAV and SpamAssassin.
The amount of received spam ...
- 11
1
vote
0
answers
298
views
Gmail detecting mails as spam [Postfix]
I am running an ispconfig web/mail server and the problem is that my mail ends up in spam at google. I have everything set up rDNS, DKIM, SPF, dmarc, so i dont think that the record part would be an ...
- 121
1
vote
0
answers
795
views
Tracing which user/process is sending mail to local postfix instance via TCP
I have a server, running postfix MTA. There is currently a spam issue. It seems one of the local users got some infected software/script/binary, that is connecting to the postfix via TCP port 25 ...
- 11
1
vote
0
answers
1k
views
How to bounce an email
I'm getting spam (thanks to NameCheap not properly cloaking my email address), and I'd like to bounce the emails back to the spammers so they think my account doesn't exist. They're not forged From ...
- 183
1
vote
0
answers
476
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 ...
- 111
0
votes
0
answers
98
views
Postfix: check sender IP but don't reject
I need to do the following with Postfix: when receiving mail from remote server, check sender IP with various blacklisting services (e.g. spamhaus or abuseipdb), but avoid rejecting mail automatically,...
- 101
0
votes
0
answers
136
views
Multiple Domains, Single IP Blocked by Gmail
I have two domain names and 1 email server.
When I send an email from my server to my gmail account, and then view the original message, emails from both domains are stated to:
Pass SPF
Pass DKIM
...
- 33
0
votes
0
answers
736
views
Detect spambot on ubuntu 12 TLS
Recently I discovered in my mail log that there is an enormous amount of spam being sent from my home server. I am running no websites, just zpanel. I closed down all the ports and am monitoring the ...
- 1,021
0
votes
1
answer
662
views
Strange emails in postfix queue
Currently I am not sending any emails, I have postfix and dovecot installed but in the in the postfix mail queue I see strange emails almost every minute, i dont know from where is this spam ...
- 252
0
votes
0
answers
169
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 ...
- 273
0
votes
1
answer
76
views
Mails to Microsoft's servers rejected
When I send an email to any Microsoft address it's instantly rejected.
Searching for a while I find that only MS servers blacklist my IP, and I need to go to JMRP and ask them to remove it: https://...
- 161