All Questions
Tagged with spam email-bounces
43
questions
3
votes
2
answers
722
views
Changing hostname for the purpose of email delivery
I have email delivery issues, and MXtoolbox says "Reverse DNS is not a Valid Hostname". I have A and AAAA records for domain.com and mail.domain.com. The data center has set up reverse DNS ...
- 147
2
votes
1
answer
196
views
Privacy-friendly Postfix bounce messages for remote rejects
The topic of handling bounce message for remote rejects has been brought up at least three times (1, 2, 3), and it looks as if there is no real solution. I wonder, though, if the bounce template can ...
- 267
2
votes
2
answers
1k
views
What exactly can I conclude from "High scoring spam message has been dropped (in reply to end of DATA command)"?
I operate a web site that offers user registrations. Users get automatic registration success e-mails, sent through a professional e-mail hosting company (not directly from our own server). This has ...
- 153
2
votes
0
answers
1k
views
How to solve '521 5.7.1 Service unavailable; client x.x.x.x blocked using Return-Path'?
How to solve or interpret following error? I'm not sure if anything should be done on client (sender or sending account of a domain) or ask remote postmasters for help.
<[email protected]> (...
- 597
1
vote
0
answers
58
views
Will enabling non-delivery notifications cause more spam?
In the past we received a lot of spam email. The past year it was a lot less and we would like to keep it that way offcourse.
We are a construction company and we receive a lot of construction ...
- 111
0
votes
2
answers
1k
views
Can a DMARC "reject" policy prevent NDR backscatter?
Our email is being spoofed. We already have SPF/DKIM/DMARC p="quarantine" policies in place however we are still receiving thousands of Non-Delivery Receipt (NDR) in our inbox.
Will changing to DMARC ...
- 521
1
vote
1
answer
1k
views
Remove AS that's falsely associated with our IP from email block list
When I try to send email from our email server to hotmail or outlook.com I get
550 5.7.1 Unfortunately, messages from [216.x.x.x] weren't sent.
Please contact your Internet service provider since ...
- 228
2
votes
1
answer
2k
views
How to drop registration mail bounces to noreply@ mail address
On CentOS 7 Linux I run Drupal, which requires users to confirm their mail addresses.
I have modified the postfix config files in the following way:
/etc/postfix/generic:
@www.localdomain noreply@...
- 734
-2
votes
0
answers
38
views
Whitelist SMTP after hacking? [duplicate]
My Wordpress (hosted on GoDaddy) was hacked via SQL injection a few months ago. I hired a consultant to help me clean out WP and the site is functioning back to normal. Unfortunately, as part of the ...
- 289
0
votes
0
answers
537
views
Receiving email bounces for emails I never sent
I've noticed a couple of times now that I get Delivery Status Notification (Failure) emails for emails I've not sent. I'm worried that someone else is using my account to send spam but I'm at the ...
- 141
0
votes
1
answer
112
views
Configure server to ignore NDRs to forged addresses/domains
AT&T's Blacklist site suggests one option of correcting mail server issues is:
Reconfigured server to ignore NDRs to forged addresses/domains
However, NDRs are returned to the sender by their ...
- 103
-1
votes
1
answer
2k
views
Sending mail when relay = 127.0.0.1 gives me 550-5.7.1 (gmail)
When sending email using web UI (for example roundcube) and my relay is =127.0.0.1
I'm getting this error
host gmail-smtp-in.l.google.com[64.233.184.27] said: 550-5.7.1
[193.198.1.11 12] ...
- 123
0
votes
1
answer
2k
views
How to set postfix to just ignore mail to nonexistent users
I'm getting a huge amount of spamming attempts to random usernames. I know that it happens to all mail servers to some degree, but during the last two weeks there was so much that my VPS's disk ...
- 211
0
votes
1
answer
292
views
email backscatter returns not seen on mail server
We have a user email that we think is under an backscatter attack. We can find no evidence of the account being compromised. The user also states they have not sent out any of the emails they are ...
- 649
-4
votes
1
answer
95
views
Restrict users to send emails only from a particular IP address to reduce SPAM [duplicate]
How to restrict people to send emails from my email domain to reduce SPAM. We are using postfix in ubuntu.
Is there any parameter which I can configure in main.cf to achieve this?
Any help will be ...
- 101
2
votes
1
answer
4k
views
How to get Google Apps groups to accept my emails?
I've been running a mailserver for myself and some others for quite some time now. Just recently (since moving to a new host) we've started seeing bounces when we send mail to email addresses that ...
- 489
3
votes
0
answers
444
views
Prevent misdirected bouncebacks from forwarding server
Note: This question is a duplicate of Avoid creating backscatter on a Postfix forwarding server, for which the only answer was "sorry, nothing you can do", but I provide more detail here, consider ...
- 131
1
vote
1
answer
133
views
Domain is being used for spam - what to do?
I recently started to receive postmaster and mailerdaemon mails about undelivered mail that have been sent from my corporate domain. It's default spam: attached files/invoices/etc. and it's not coming ...
- 361
0
votes
2
answers
588
views
Postfix sent mails are bounced or go to spam
I recently tried setting up a mail server to be able to send mail for the websites I host with apache.
At first I tried to work with exim but I was overflown with error messages and mails I tried to ...
- 161
2
votes
2
answers
221
views
Spam mail forwarded through my server using valid user
I am getting "Undelivered Mail Returned to Sender" messages. The relevant mail messages are being forwarded using a valid user ([email protected]) on my server (server1.nbicharts.com). I control ...
- 23
2
votes
1
answer
297
views
Can IP reputation be affected due to automatic forwarding?
I am hitting a dead wall with the support team of my email hosting provider.
The IP they assigned me was blacklisted and so sending emails to AOL.co.uk end up getting rejected. After several emails ...
- 135
0
votes
1
answer
29
views
Do spam impersonators impact my server's reputation?
Recently I opened my server's webmaster email inbox and found 32 "Delivery status notification failed" emails reporting the failure of the delivery of 32 emails I did not send.
After some ...
1
vote
2
answers
2k
views
Spam delivered by mx.google.com despite SPF fail
Some spammer use our e-mail address as sender in forged e-mails. Now we got thousands of bounced messages from no longes existing e-mails.
We set up SPF and DKIM records but it does not stop.
...
1
vote
2
answers
158
views
How to send a large number of emails to a dated list of receipients
One of my clients was to send an email to ~100,000 recipients. The client is a state organization, the emails are not promotional, the recipients are all members of the organization and they are sure ...
- 119
0
votes
1
answer
86
views
Sending bulk / single emails from a single domain [duplicate]
Let me explain our situation:
We have a web application that uses subdomains for each customer instance:
customer1.example.com
customer2.example.com
Every instance can have over 500 users, which ...
- 109
8
votes
3
answers
4k
views
Should I let email bounce or send it to a blackhole?
I have a lot of unused (old, dead) accounts on my machine. Many of them receive literally thousands of emails a day, all spam.
If the account was used by a person, I let the email bounce so that ...
- 8,151
4
votes
1
answer
1k
views
Silently drop OUTGOING mails to [email protected] (more than 3 dots in username part)
With postfix-2.6.6-2.2.el6_1.x86_64 on CentOS 6.4 is there please a way to inspect OUTGOING mails and silently drop them (i.e. do not send them) if the recipient looks like [email protected] (i.e....
- 734
2
votes
1
answer
743
views
Postfix: don't bounce for remote rejects
I'm having a problem with sending bounces to spammers when a remote "trusted" smtp server rejects a mail. My server manages mail for company1.com that has a virtual alias [email protected] that ...
- 21
0
votes
1
answer
946
views
Spam sent from fake email accounts on my domain [duplicate]
One of my clients is getting thousands of "Delivery Status Notification (Failure)" emails per day and it's replied to random email accounts that don't exist on the domain. The content of the emails ...
- 101
0
votes
1
answer
1k
views
Our outgoing emails from a shared hosting provider (Bluehost) are returned because the server is listed as SPAM SERVERS
I am getting very frustrated with this web hosting provider -- Bluehost.com. We have several small business sites hosted with them. We also use email accounts provided by the Bluehost for our outgoing ...
- 111
1
vote
1
answer
571
views
Making CommuniGate Pro react better on SPAM and Backscatter issues
I would like to make a CGP mail server as SPAM free as possible.
I made some research but didn't find so much.
So my question: where should I start in order to make CommuniGate dealing better with ...
- 471
2
votes
1
answer
357
views
How do I configure my domain and web application so the emails send from the latter are not blocked as spam?
I have a WordPress site that needs to send notifications to an email address. I would like the from field from this emails to be an address on my client's domain.
I dont know much about email ...
- 191
3
votes
3
answers
7k
views
Make Exim send bounces to postmaster instead of the sender, for non-local sender
I have a few e-mail aliases that forward to external hosts. Currently, if the external host rejects a message, Exim generates a bounce message and sends it to the original sender. This is bad because ...
- 321
1
vote
1
answer
887
views
Email id @ IP address
I getting the following error while I am taking SMTP test.
The SMTP server does not accept mails to postmaster@[IP_ADDRESS]. This is a very bad thing, as this address is used by people that don't ...
0
votes
1
answer
148
views
Are you able to filter outgoing NDRs based on Header in Microsoft Exchange?
I administrate an email system for a commercial ISP. I'm currently having an issue with one of our customers relaying outbound SMTP traffic from their Exchange system through ours, and they're ...
- 3,521
0
votes
2
answers
3k
views
Stopping spam-related bounced emails
One of my e-mail customers is currently on the receiving end of massive amounts of delivery failure notices as a "Nigerian scammer" seems to be using her address as its MAIL FROM field.
A lot of it ...
- 135
25
votes
7
answers
20k
views
How to stop spammers from sending spam as me
We've starting to receive bounced spam messages and the sender is one of our email address. We know that we don't send spam from that address. We've tried changing the password but we're still ...
- 1,003
10
votes
2
answers
2k
views
Avoid creating backscatter on a Postfix forwarding server
I run a Postfix server that hosts a small, alias-based mailing list. Let's say people@myserver forwards to alice@someprovider and bob@someotherprovider. Now, alice@someprovider might use a more ...
- 2,259
4
votes
5
answers
3k
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 ...
- 143
4
votes
6
answers
10k
views
Hotmail and Live.com rejecting all emails [duplicate]
I have been having problems sending emails from my server to hotmail.com and live.com email addresses. I have read other posts on serverfault but they have not been helpful. Here is the error message. ...
- 233
0
votes
2
answers
224
views
Will Hotmail DELIVER to spam-friendly ISP?
I have a user who is using Hotmail to communicate with one of our suppliers.
Recently, Hotmail started bouncing emails to that address (while other ISPs are working fine.) Hotmail bounce messages ...
- 274
4
votes
1
answer
393
views
Indirect Postfix bounces create new user directories
I'm running Postfix on my personal server in a data centre. I am not a professional mail hoster and not a Postfix expert, it is just used for a few domains served from that server.
IIRC, I mostly ...
- 141
0
votes
3
answers
457
views
Need advice on integrating mail server with a smallish social network?
I have been given a task to setup email management and delivery for a smallish social network. We're currently sending out about 1000 emails per day with help of VerticalResponse (a bulk emailing ...
- 471