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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6 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, ...
2
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1answer
20 views

Avoid Mail Delivery System Bounce Forward

I have the following mail setup: This is what happens at the numbered stages: some spam-address (which actually does not exist) sends spam to info@xyz.org the info@xyz.org has an auto-reply ...
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0answers
15 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
21 views

Postfix - bounce messages are not sent to postmaster

I ban and reject some spammer domains/IPs, via: smtpd_recipient_restrictions = check_sender_access regexp:/etc/postfix/client_checks, ... client_checks file: /\@domain\./ REJECT and it works ...
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0answers
32 views

Webserver to send emails from Postfix

I have a problem with my web server sending out email from websites through postfix. I have server that is running Ubuntu 12.04.5 and using Apache webserver. I have installed virtualmin on the server ...
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1answer
31 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 ...
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2answers
50 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 ...
6
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1answer
303 views

How do I get off Mimecast's greylist?

Emails from our servers sent to Mimecast are being "temporarily rejected" due to greylisting. Mimecast has docs on this; they say that every time they see a unique IP and sender, they greylist the IP ...
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1answer
24 views

hMailServer and reverse DNS

I have an hMailServer installation on a Windows 2012 server VM and need to properly set up reverse DNS + the mail server in order to avoid getting e-mails bounced back from certain big providers, ...
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0answers
19 views

Email delivery status

I am trying to track an email. I use mutt so that I can edit the email headers directly before sending, and I added: X-Confirm-Reading-To: me@email Disposition-Notification-To: me@email ...
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1answer
27 views

Postfix: find out why mail bounces

My otherwise pretty well working postfix mail server is refusing to deliver a single mail with attachment. Unfortunately i don't have the error message available which was sent to the sender. But here ...
0
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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 ...
2
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1answer
59 views

sendmail cant send mail - Centos6/7

I have a newly minted CentOS 6.7 box to set up sendmail on. It seems sending email but not really, no idea whats the issue could be. What I did: yum install sendmail sendmail-cf sendmail-doc ...
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1answer
36 views

Required Mailboxes

Regarding this answer http://serverfault.com/a/134814 What are the minimal mailboxes required for a domain? Currently I only specify these mailboxes: root@ webmaster@ postmaster@ admin@ domain@ ...
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0answers
25 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 ...
0
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3answers
71 views

Exchange 2013 Account experiencing weird longterm bouncing issue

We recently migrated one of our clients to Exchange 2013 from Google Apps, since the migration a single user has been experiencing inexplicable bounces emails and calendar updates. Some of the ...
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1answer
92 views

Postfix on server bouncing emails sent to same domain emails, external domains working

My @example.com email is hosted with Google Apps. I am able to send & receive email to all 4 accounts I have created for @example.com. I also own www.example.com. The issue is not being able to ...
3
votes
1answer
2k views

IP address is not allowed to send mail from DOMAIN

Today I heard that a customer can't send email to us. He received the following error: < #5.5.0 smtp;550 [ipaddress] is not allowed to send mail from [domain name]. Please see ...
3
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1answer
73 views

Dynamically limit postfix attachment size

For a project I am currently working on, we received a requirement for a 'dynamic' mail attachment size limit. For postfix (which we currently use) this would be easily implemented using the ...
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0answers
73 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
130 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
21 views

Forget forwarded emails delivery errors

I have problem with configuring Sendmail, I've read a lot of topics on the net about similar problems but I didn't found a good answer for this scenario. Main problem is that my server has poor ...
2
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2answers
98 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 (mike@proactech.com) on my server (server1.nbicharts.com). I control ...
2
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1answer
47 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 ...
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1answer
41 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
254 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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1answer
17 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 ...
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0answers
293 views

SMTP error : Remote host said: 550 5.7.1 At least one FROM header address not allowed to send mail from IP ADDRESS

We are developing an email sending app, and we allow our users to specify the From: header their emails will be sent from. Let's say our domain is mydomain.com and our client domain is ...
0
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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 ...
0
votes
2answers
318 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. ...
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1answer
103 views

Export or Forward /var/spool/mail/USER (readable for customer)

there are some bounce mails in the /var/spool/mail/USER directory that failed to send. Now the customer receives all of those mails from us because he does not have direct access to them. I can ...
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2answers
117 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 ...
1
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1answer
47 views

Originating (non-critical) emails from a “less-trusted” host

Background We have a webapp running on webapp.example.com that (amongst other things) sends messages by email from time to time. These messages are non-critical: whilst we would like to make a best ...
5
votes
3answers
95 views

What to do if one doesn't want to receive email bounces?

Background—the standards RFC 5321 §4.5.5 states: All other types of messages (i.e., any message which is not required by a Standards-Track RFC to have a null reverse-path) SHOULD be sent with ...
0
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0answers
35 views

Outlook 2013 / Exchange - Sender address not parsed at some recipients

When sending mails from Outlook 2013, some recipients are experiencing issues to answer that mail. Their answers are always bounced back by their smtp, there is no recipient address then. I asked them ...
0
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1answer
52 views

Possible to setup a secondary email server with unique addresses?

It is possible to setup two email gateways such that if a record doesn't match the first server then it attempts a second server before failing to deliver? Background: Client recently switched from ...
0
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1answer
153 views

How would get an email server reputation via cli or script?

I am trying to monitor email server reputation via cli or script i.e. https://www.senderbase.org/ I found a way supposedly to do it via dig, but the output appears to be very incorrect. It indicates ...
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1answer
247 views

Will exchange server receive emails with wrong address [closed]

Say if I sent an email to user@theirdomain.com, the exchange server and the user will receive it, but if I sent an email to fakeuser@theirdomain.com using SMTP client, there will be no fakeuser ...
1
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0answers
1k views

Rejected emails when sending from google apps to some domains (550 Unrouteable address/Sender verify failed)

i'm sending emails from my domain prokubo.com using google apps and i'm having returned emails at least when sendind to two different domains: Delivery to the following recipient failed permanently: ...
5
votes
2answers
897 views

Parse undelivered mail headers (bounced mail)

What is the best way to parse the headers of bounced (undeliverable) email that is sent back to my server and determine whether it is a soft or hard bounce? I only send opt-in emails to my users, but ...
-1
votes
3answers
1k 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 ...
2
votes
2answers
8k views

reason: 403 4.7.0 TLS handshake failed

Sending email to one particular domain, I get the following error: ----- The following addresses had permanent fatal errors ----- <> (reason: 403 4.7.0 TLS handshake failed.) ----- ...
-1
votes
3answers
128 views

Postfix setup from domain [duplicate]

I'm trying to sending email from nagios monitoring to some email addresses. But I have a problem with setup my from domain when I'm sending an email every time my from email address seems like this: ...
0
votes
1answer
161 views

Mailserver creating mail accounts upon “User unknown in virtual mailbox table” on local delivery

I'm running an older Postfix and Courier mailserver with virtual domains. I recently experienced that local delivery (using webmail) to a not existing mailbox would result in that actual mailbox to be ...
1
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1answer
151 views

Returning mails - revDNS + Helo command rejected: Host not found [closed]

i've got a VPS server and directadmin with multiple domains on it. I've noticed annoying problem with email sending on one of domains. Sometimes when I send email to client it bounce to me with ...
0
votes
1answer
48 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 ...
0
votes
1answer
661 views

Make postfix not send bounce emails when rejected by Cluebringer (policyd v2)

I have recipient throttling (quotas) enabled on cluebringer and it's working well. However, every time someone is being throttled, postfix sends back a bounce mail. I do not want it to send back a ...
-1
votes
1answer
248 views

How to redeliver 'Undelivered Mail Returned to Sender' in /var/spool/mail?

After changing the IP of a server that was configured as a satellite email system I missed to update mynetworks on the mail server to allow the sending of emails on behalf of the new IP address. ...
1
vote
1answer
93 views

What is the best approach to handle email form abused by bots?

I just recently moved to a Dedicated Server hosting from a normal Reseller Hosting, and currently facing issue with email blacklisting. One of my clients has about 4 contact forms that automatically ...