Questions tagged [email-bounces]

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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9 views

Exim4, it's a good idea to automatically populate local_sender_blacklist based on hard bounces?

GMX in it's sender best practice says: The sender must immediately remove email addresses from their dispatch lists if hard bounces occur I'm using exim4, and with eximstats you can obtain a list of ...
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96 views

Reverse DNS PTR record

I have a dedicated server (Ubuntu 18.04 with virtualmin & webmin) which is hosting 7 WordPress sites on it. I have set up MX, DMARC, SPF and DKIM records for each one of them but dns tests online ...
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Can I make mailman archive the bounce messages it has processed?

I am really new to mailman so maybe I am just missing something obvious. However, as far as I understood, when a message sent from a list triggers a bounce at some user, mailman will try to ...
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Amazon SES Reputation Dashboard: What are the bounce rate and “eligible e-mails”?

I just sent an announcement to 1,600 e-mail addresses that include a lot of old colleagues I haven't talked with in 25 years. Because of this, I knew there would be a lot of bounces, and there were ...
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27 views

have postfix bounce all but procmail related non-delivery notification

Pardon me for reposting on serverfault; I mistakenly posted it originally on stackoverflow before, and was kindly reminded to post here..... Problem: I experience every now and then non-delivery ...
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1answer
135 views

exim. how to stop sent bounce message

I have smtp server exim. I want to forbid to sent bounce message if the e-mail came to a non-existent address. I added to the beginning of acl in the config: begin acl acl_check_rcpt: ...
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1answer
23 views

Postfix working on separate server having issues delivering mail to a specific domain

I have the following situation. My main domain is pointed to a Hostgator account. Because of bad performance of the site, the client decided to give DigitalOcean a go, but leaving the e-mails on ...
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29 views

Postfix/CentOS 8 mail for external servers loops back to myself

I have installed a CentOS 8 VM a couple of weeks ago, and since I've bought my domain last week I decided to run a mail server alongside the apache web server and DBs on that machine. After a bit of ...
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14 views

Secure Sendmail against Backscatter

I'm running Sendmail 8.15.2 on Debian 10.3. My server is again and again blacklisted on backscatterer.org (normally it's listed, after four weeks it's delisted again, but three or four weeks later it'...
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postfix: mail to localhost gets delivered but mail to FQDN bounces “mail for localhost loops back to myself”

My issue is that (on the mail server, which is named mail-test) I can do this: echo "test!" | sendmail ethan@localhost but I can't do: echo "test!" | sendmail ethan@mail-test.[REDACTED DOMAIN] ...
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3answers
251 views

Not able to send mail using postfix-sendmail and getting bounced

The emails are not being sent to email addresses with domainname.co as domain name. I have in Ubuntu system three users namely root, ubuntu & domainname. The following is the log(tail /var/log/...
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Can I redirect all of the NDRs for my domain to a central mailbox in Exchange Online?

At my company our ticketing system pulls from dedicated mailboxes, but when an email is sent from one of them due to some automated process or other and fails it of course throws an NDR. The problem ...
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Postfix won't send big email DESPITE higher values of mailbox_size_limit and message_size_limit

My Postfix was failing to send big emails and was sending small ones. In the logs I was getting: (cannot update mailbox /var/mail/root for user root. error writing message: File too large) So I ...
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1answer
268 views

Email delivery issues with Hotmail/Outlook

I am using SendGrid to send emails and I have properly configured my domain (SPF, etc.). Usually everything works, except that Hotmail/Outlook often rejects the emails I send: reason": "550 5.7.1 ...
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66 views

How to send subdomain emails to main domain?

I created a mail server (mail.mydomain.com) and can send emails from something@mydomain.com without any issue. But when some email addresses (which I tried to send email to) fail, bounce messages try ...
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20 views

How to forward bounce message to another postfix server

I have a server with standard postfix + dovecot configuration for sending and receiving mail. Now I wanted to add second send-only server for newslist delivery. The newslist has Return-path: that ...
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1answer
43 views

O365 - Email redirecting to shared inbox

I have a odd instance where by an email (password reset) from one of our third-party providers is being redirected to a shared inbox rather than the user it was intended for. I can see on the ...
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3answers
149 views

Message-ID of delivery report is equal to original mail

I discoverd that the delivery status report has the same message-id as the original mail. Here is the text of the delivery report: Incoming DSN message: From: Mail Delivery Subsystem <postmaster@...
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129 views

Split Delivery between G Suite Mail in Zimbra server found bounce back email but not show detail

I have setup Split Email Delivery between Google Apps(GSuite Mail) and Zimbra server Gsuite Mail : admin@sgfcap.com Zimbra Mail : zimbra@sgfcap.com TEST CASE : 1 I try send email from external ...
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1answer
165 views

How can I get my incoming mail working again?

We are using webmin and virtualmin the emails have been working great over the last couple of weeks using virtualmin but today suddenly they have stopped. I get this in my mail log: Jul 1 13:15:03 ...
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1answer
58 views

How to reliably determine if an email has bounced

I send out a weekly newsletter to subscribers of my newsletter. I send email from noreply@example.com because I don't want people to be able to flood my own email box with replies when they receive ...
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2answers
90 views

How can I create a bounce email?

I run my own mail server, which (among other things) handles emails for one of my services. The service in question takes bookings and sends booking confirmation emails. The emails come from noreply@...
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Delivery Status Notifications not being retried

I was checking my ISP's Out of Office reply system and I found that although they sent a message to my server, because my server replied with a 4xx error code, the server did not attempt to re-deliver ...
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152 views

Updated MX Record Causing Bounce

We recently migrated our company to a new mail provider (Gmail), and updated our MX/SPF/DKIM/DMARC records. Checking the DNS propagation via https://dnschecker.org/, all changes are reflected. ...
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183 views

What does gmail response “Requested action not taken: mailbox unavailable (in reply to MAIL FROM command))” means?

When out of office mails from our company go to a gmail address, we get this error in return: May 2 12:59:29 lg-info-mail postfix/smtp[22620]: AB34490FD1: to=, relay=gmail-smtp-in.l.google....
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342 views

Add sender to my exchange out of office mails which are sent via postfix with an empty sender

Out of office mails works internally but externaly the logs says : - it goes out of Exchange 2010 to go to Postfix (without any sender), - Postfix sends it out to the sender without any sender - the ...
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21 views

mail not working pointing at old server

Hoping you can help, I'll preface to say that I'm working for a small company and I'm the "IT Guy" as I'm not sure what to ask google, and I've searched here for hours, and still no closer to an ...
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1answer
3k views

Repairing e-mail “domain reputation” on google?

Google's gmail has recently started marking all mail from domain example.com (real domain name is hidden) as spam, with grey-box explanation of: "Why is this message in spam? Lots of messages ...
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2answers
2k views

Email Spoofing Or Something More Sinister? [closed]

I'm a software developer and my wife works at a small business. I'm not a security expert, but the story their IT contractor is giving her doesn't add up to me. Lately some people who send email to "...
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1answer
219 views

Why are emails sent to me bouncing with incorrect MX records error message?

I am having some very strange issues with email delivery to two different domains in separate google apps accounts. real domain name is liberatumsolutions.com and libsol.eu. The below error message ...
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48 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 ...
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1answer
634 views

Setting Postfix for outbound email via SMTP with local root delivery for cron reports

I recently had to diagnose a couple of servers running Postfix which emailed results of rsync cronjobs when they returned a non-OK value. While Postfix was emailing the recipients on rsync failure, I ...
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490 views

What is wrong with this e-mail which is failing SPF(mailfrom) and DMARC?

This is a follow-up from "Why is my opendmarc failing pretty much everything that comes through?". I'm really struggling to understand what is going on. Outgoing mail is verified correctly by the ...
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1answer
35 views

Unable to receive email from gmail on my VDS

I am using mailu (docker mail server) as all-in-one mail server solution: pop3/imap/smtp with web-interface and so on. I can send emails from my vds to any other email and I can send email from one ...
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206 views

Postfix: do not create bounce message for virtual_alias_maps with remote servers

I am using virtual_alias_maps to forward mail to remote mail servers (GMail, icloud). I have spam prevention in place myself (SPF checks, Before-Queue Content Filter etc), but often enough spam will ...
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1answer
421 views

Remove dovecot emails based on subject

My server just got used as the return address for 100,000 spam emails. The emails are stacked up in various user's accounts and I want to delete them all. Is there a way using dovecot 1.1.7 to ...
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1answer
308 views

how to stop postfix relay server to forward bounce/NDR emails to client

I have a setup with 1 pure mail server, lets call it mail, and 1 web server, lets call it web. When web sends out email to an external server it uses mail as relay. Both servers use postfix. mail has ...
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554 views

Emails dropped with “550 Action not taken (in reply to end of DATA command)”

In the past couple days, some emails from my server have been bouncing with this error. Nothing has changed on my end that I'm aware of. It doesn't seem to matter where the email is going-- they ...
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4answers
903 views

Is it possible to change MX records without downtime/returning/dropping messages?

We're migrating e-mail hosting from SERVER-A (on HOSTING_CO-A) to SERVER-B (on HOSTING_CO-B). SERVER-A will continue to be functional until the transition is complete and HOSTING_CO-A has their own ...
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2answers
53 views

Prevent bounce of outgoing email

Is it possible to specify a header in an outgoing mail (I'm using PHPMailer) that tells the receiving server that I do not want bounce or out of office replies back? The use case is for verification ...
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0answers
273 views

Postfix: Script to difference hard vs soft bounces

I followed the steps mentioned in the forum - how to collect bounces for triggering a script upon a bounce receipt. Now, I would like to classify the bounce depending on the status. It would be ...
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2answers
303 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 ...
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1answer
327 views

How can i (re)send /var/mail/root (Original Mail)?

Our server was reconfigured and a lot of email as failed to be delivered. I found a thread to resend email from /var/mail/root here : https://serverfault.com/questions/90023/how-can-i-send-var-mail-...
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1answer
22 views

Disclosure of recipient’s forward email address when my email bounces

A few times I had a situation like this: I sent an email to foobar@example.com. For this email, I received a delivery failure report, giving reasons like "550 5.1.1" (user unknown) or "552-5.7.0" (...
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1answer
3k views

Mobile devices unable to send mail due to servers sending quota being exceeded

I have a customer who has their own exchange. Their mobile devices are struggling to send emails with attachments and keep reporting that "your email server's sending quota has been exceeded". I've ...
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1answer
649 views

Postfix: redirecting an email to local user (User unknown in virtual alias table)

My question is similar to others, but their answers were unhelpful. What I want to do: Send email from xyz@domain.com and route incoming mail to xyz@domain.com to multiple external (e.g. x@gmail.com) ...
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2answers
995 views

Zimbra server compromised - how to investigate

We have a zimbra email server and one of the email accounts was compromised. The problem we have now is that a lot of spams are sent from that server and we cannot identify which account is ...
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1answer
1k views

Postfix error with remote mailserver - Error 550

i am new to mailservers and i think i totaly destroyed the config and i have no clue how to fix this mess. For my understanding things are "OK" but i think i'm missing something important. I replaced ...
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0answers
436 views

How do I get my server off the ivmSIP blacklist?

On March 22nd I was notified by MX Toolbox that my server ip was blacklisted by ivmSIP and Hostkarma Black. I was aware of an attack some of our clients sites had suffered towards the end of January ...
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243 views

Postfix email throttling for deferred queue

I have an issue with email sending speeds on postfix. the email to yahoo are getting throttled and getting suspended temporarily. I edited the main.cf configuration to slower down the speeds and add a ...

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