email bounces are messages that are delivered to the nominated postmaster account on an email server to indicate a problem delivering the mail to one or more recipients.

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13 views

postfix outbound relay, only permit email to or from mydomains

How can I allow Postfix to: send emails from any domain to my domain, or from my domain to any domain, but reject emails from any domain to any domain. Example: mydomains = example.org, ...
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0answers
30 views

How do I configure the listener binding address for python 2.7 smtplib running in a windows environment?

I am setting up an application called openemm which uses the python 2.7 smtplib to handle smtp transactions. My outgoing mail works fine but smtplib is not responding to incoming requests on port 25 ...
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1answer
29 views

How to troubleshoot emails from some hosts not being received without error messages

I am trying to troubleshoot the server I mantain. It is a Centos 6.6 with Plesk 12.0.18, it uses Qmail and Courier as email services from what I can see. Now in general all emails work succesfully ...
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0answers
35 views

Mail spoofing or server infected

Today I received this email in my inbox. 2 IP appear in "FROM" in the body email. One of them is IP of my hosting provider. But is not the IP of my website neither from I send emails . it might be ...
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0answers
81 views

Exchange server: Why do a couple users have random numbers at the end of their “Windows domain\user name” and is this causing problems?

Background on the problem: I work for a company which is a Panasonic Partner. As a part of this program, Panasonic regularly sends out "Partner Alerts" to everyone who is signed up to receive them. We ...
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1answer
178 views

Why does reject_null_sender in iredmail rejects valid bounces?

The reject_null_sender plugin in iRedMail indicates its purpose as: Reject message submitted by sasl authenticated user but specifying null sender in 'From:' header (from=<> in Postfix log). ...
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1answer
43 views

Sender IP in blacklist [duplicate]

When we send mails to AOL accounts, they are rejected and bounce back. After checking our IP on blacklists, there seems to be two lists on which our IP appears blacklisted. This comes as a surprise to ...
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1answer
415 views

Outbound SMTP email not being delivered, but still disappearing from the queue and pickup folder

After setting up my smtp server on a Windows 2012 server r2 on port 587. I tested the email functions by creating a text file labeled email with the following code inside: From:admin@mydomain.com ...
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0answers
27 views

Figuring out why prodigy.net DNSBL is flagging me? [duplicate]

For the last 10 days, I've been unable to send mail to sbcglobal.net addresses from brinckerhoff.org (192.81.130.145). The responses from the sbcglobal.net MX (which turns out to be a prodigy.net ...
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0answers
30 views

postfix bounce email to seperate dovecot server [duplicate]

I have searched for information about installing dovecot on a different server than the one that postfix is running. My setup is multiple postfix servers running in docker containers. I like to ...
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1answer
50 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 ...
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2answers
89 views

Receiving mail in a python process on an aws instance

I'm using a Python smptd server on an AWS instance. It's listening on localhost, port 25. I can send mail to it through a Python smtp client on the same instance. I have an elastic IP associated with ...
0
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1answer
32 views

how to discourage email spoofing

One of my production server emails look like to be spoofed from another network. The team (group or individual or professional company) is sending mass mails out to their list of users, using our ...
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0answers
1k views

553-Message filtered - HELO Name issue?

I am having major issues sending from my SBS2011 machine to Message labs server-13.tower-134.messagelabs.com #553-Message filtered. Refer to the Troubleshooting page at ...
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0answers
12 views

SMESERVER: Mail not receiving, 550 v=spf1 a -all (suddenly appeared 5/21) [duplicate]

My situation is exactly the same - SMEserver 7.51 (yes I know I need to upgrade) been running for years and I get the same spf error message back just starting Wednesday afternoon(5/21). I also tried ...
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0answers
426 views

migrating to new server, would like to keep sending email from existing server

Hello I'm in the process of moving my site to a new host (ie new IP). I run a social site that sends a large volume of (valid) email, and I have built up a good sending reputation with my current IP ...
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1answer
343 views

Setting Up PTR to correct “Forged hostname” error

Our e-mails mostly get through fine, but here's an error I haven't seen before. Diagnostic-Code: smtp;550 5.7.1 ... Forged hostname for 66.132.221.45 >which resolves as www.medialabinc.net but ...
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0answers
175 views

Outlook 550 5.6.0 unacceptable content

A user is using Windows 7 / Outlook 2010 SP2 with emails going through a Jerseymail POP3 setup. He is receiving a bounce back as soon as he clicks send - The following recipient(s) cannot be ...
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1answer
249 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 support@company1.com that ...
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1answer
362 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 ...
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1answer
182 views

Configuring Sendmail to report successful deliveries

I now have Sendmail report the fail deliveries by bouncing back to a bounce mailbox. E.g. failure to reach joe@example.com would bounce back to bounce+joe=example.com@mysite.com. I was wondering if ...
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2answers
1k views

Dovecot Not Receiving Mail From Outside Servers

After a long and hard battle, I was able to configure postfix to send mail to outside domains. Now the problem is receiving them from outside domains. I use the pop3 protocol with dovecot, and it ...
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4answers
384 views

Is there a way to get Postfix to both forward an e-mail *and* reject it via recipient_address_rejected

In postfix, I'd like a way to deal with e-mail accounts that are no longer active by having postfix send the standard "Recipient address rejected" type message, but still forwarding the e-mail to ...
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1answer
382 views

exim bounce address tag validation

I ma trying to set up BATV in exim but i am always getting an error: F=<> temporarily rejected RCPT <prvs=1234abcd=my_email@my_domain.ru>: invalid "condition" value ...
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2answers
614 views

Postfix bounce local delivery with source address from orig_to

I am creating a python script to deliver local mail using various means. The problem is this: This script has to accept multiple virtual domains defined in /etc/postfix/virtual The script does the ...
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1answer
2k views

Recipients Auto Rejecting Emails Sent With Exchange 2010 - Certificate Error

A strange problem recently developed with one of my Exchange 2010 servers. I have an exchange server setup as part of a Windows Small Business Server 2011 installation. The email for the domain was ...
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1answer
1k views

Emails from Hotmail to our domain always bounce

Now this is a rather odd problem with emails from any hotmail address being bounced by one of our domains. First off, I can guarantee that this is not a spam filter issue as there is defintitely ...
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1answer
397 views

Bounced emails for hosted sites bounce to nobody at the server - how to configure to return to the hosted site

I am helping out with some Linux admin work. The server hosts several sites. The admin interface used is WHM. When an email from one of the hosted sites bounces, the site is not notified - it just ...
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2answers
245 views

My mails are filtered and delivered to Hotmail's JUNK mail folder

I've contacted Microsoft and filled in the JMRP, SNDS, and SenderID registration. Also I've put the correct SPF record on my server. After several tests I note that emails containing plain text go to ...
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1answer
157 views

smtp working pop not working

My DNS settings are as follows. A Record: HOST = @ POINTS TO = 65.75.241.26 HOST = beta POINTS TO = 65.75.241.26 HOST = stable POINTS TO 65.75.241.26 CNAME Records: HOST = e POINTS TO ...
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1answer
1k views

Handling bounced email when using a postfix smarthost

I'm running a high availability cluster, and so far, most things work great. I have two external machines that act as outgoing mail hosts (smarthosts). The internal hosts are configured to relay all ...
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1answer
759 views

Email being bounced if email recipient domain name == local domain

I have a website where the domain uses an external mail server (defined by mail.mydomain.com and the MX record). An example email address is johndoe@mydomain.com. Whenever the server sends a ...
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2answers
741 views

centralize postfix bounces

Is there any way to tell postfix to send ALL bounces to ONE mailbox? Right now bounces are sent to the Sender, but I would like to collect them all at one central place for further analyzing etc. I ...
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3answers
161 views

Why can I send an email to an external email address from outside of the server but not inside?

I have an email address that is a forwarded address hosted on GoDaddy. It forwards to an email address on my Exchange 2007 Server. My clients have no problem sending to it and if I use my own G-Mail ...
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1answer
132 views

How to automatically manage undeliverable mail / answers

My application is delivering automated E-mail notifications to the registered users. I would like to find a way to use the undeliverable mail notifications sent by the remote servers to save the ...
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2answers
196 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 ...
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1answer
565 views

Postfix bounces and rejects some of non existing emails for same domain

Postfix serves for my virtual domains and works fine. But for one of my domains: - it bounces mails targeted at mail@domain.tld - it rejects mails targeted at nonexisting@domain.tld problem is, ...
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votes
3answers
57 views

Can I use MX Record Configuration to send one account's email to one server and a second account's email to a different server? [closed]

For example, let's say my MX Record(s) specify: 0 server1 mydomainexample.com 1 server2 mydomainexample.com Now let's say: me@mydomainexample.com is an account on server1 and ...
-1
votes
1answer
1k views

hotmail doesn't accept my emails

I have installed and configure postfix as a mail server in ubuntu 12.04. I can send emails to gmail with no problem but I can't send them to hotmail when i enter in putty dig @ns1glr.name.com ...
-1
votes
3answers
2k views

550 sender rejected - sender domain has no MX/A record. Different IP for MX & A Records [closed]

I have a website that has different hosting for website and email. I host the website and another company hosts the email and handle the domain. This is how the domain is set up: (The domain name ...
-1
votes
1answer
52 views

e-mails of all the accounts were blocked due to spamming activity of a single account in shared hosting [closed]

I have around 25 websites hosted on shared hosting environment. Somebody, who has also hosted a website on the same hosting server started spamming. Due to this spamming activity the shared IP got ...
-1
votes
2answers
2k views

What exactly should HELO say?

I have MX records setup at mail.domain.com and my domain is visible through domain.com I am sending email via PHP PEAR Mail package. This page claims I can change: The value to give when sending ...
-1
votes
1answer
4k views

“Message rejected by Google Groups”? I am not using any Google Groups

Some of my email messages (sent from mydomain.com) just fail, message is returned with the following explanation: Delivery to the following recipient failed permanently: info@somecompany.com ...
-1
votes
1answer
45 views

Email bounce notification for an email account that doesn’t exist in exim mail server

Need help with Exim mail server setting. I want to set the exim mail server to trigger an email bounce notification for an email account that doesn’t exist. For example: abc@abc.com - should bounce ...
-1
votes
1answer
725 views

Unexpected failure, please try later (in reply to end of DATA command)

while trying to send emails to the following address some_user@f-gs.jazztel.es i always get the following error message. Could any one tell where can i look in order to find what's going wrong? This ...
-1
votes
1answer
143 views

Send one invalid email response to sender

I discovered that my postfix/dovecot configuration isn't rejecting emails. If a person sends an email to an invalid email-address, it just drops it. I am fine with this behavior since I think it ...
-1
votes
2answers
2k views

Same domain only : smtp; 5.1.0 - Unknown address error 530-'SMTP authentication is required [closed]

I have a very strange problem after moving my netwave.be domain from WebHost4Life to Arvixe. I configured several email adresses, like steven@netwave.be and sandra@netwave.be. For POP3 I can use ...
-1
votes
2answers
721 views

Can anyone tell me why an e-Mail with an attachment fails from one domain but not another?

I am trying to get e-mail to a customer of ours. From my internal Exchange server, I can send the e-mial successfully to the customer if there is no attachment. I can send the email successfully to ...
-1
votes
1answer
4k views

How configure Zimbra to bounce mails over a given size limit?

How to configure Zimbra to bounce/notify email to sender due to over attach size from external mails like Gmail, Yahoo, etc.. I am using Zimbra open source edition. Undelivered mails are not bouncing ...
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votes
0answers
7 views

Mail marked as Spam in Live services (Hotmail/Office 365/Exchange etc.) [duplicate]

So I have my own custom domain with my own mail server, all my outbound e-mail goes through Mailgun.net with working DKIM/SPF and subscribed to all Microsoft services (anti-spam bullshit program). ...