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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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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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27 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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Not able to send mails from Godaddy VPS server to Zoho [duplicate]

My VPS Linux server hired from Godaddy has 10+ domains hosted in it. None of them are able to send emails to Zoho hosted mails. Mails to other domains (Gmail, Live, Yahoo etc.) are working well and ...
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27 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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1answer
53 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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0answers
17 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
326 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 from ...
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29 views

how to put hard bounced emails to the hold queue with postifx?

A postfix server of mine was for a short period of time on a blacklist (misconfigured HELO String 'localhost.localdomain'). The 550 rejected emails got deleted immediately from the postfix queue, ...
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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
97 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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0answers
47 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
189 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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0answers
139 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
18 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 ...
2
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0answers
89 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 ...
0
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1answer
184 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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0answers
21 views

Cron sends mail to the wrong domain name

I set up a mail server with iRedMail. I am getting a lot of "unsent mail returned to sender" mail from my server. My server knows itself to be "server.example.com", but only handles mail for "example....
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1answer
133 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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0answers
223 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 ...
2
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4answers
203 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
45 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
140 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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0answers
29 views

Postfix rejecting incoming messages from one sender

a user is complaining that all incoming messages from a specific external user are being rejected and never making it to her inbox. maillog contains the following entries. It looks like milter is ...
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1answer
124 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
150 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
20 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
878 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 ...
0
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1answer
309 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) ...
2
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2answers
514 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 ...
1
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1answer
431 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
308 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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0answers
136 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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0answers
144 views

email bouncing domain hosted G Suite

I have a client where some of their emails, including some email from me bounce back with a smtp; 550 code. There doesn't seem to be any pattern on which emails bounce and which go through. One of ...
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0answers
152 views

Setting up bounce handling by using bounces+@example.com not working

I have a postfix server setup with alias using /etc/aliases in which we have: postmaster: root bounces: root also config in main.cf are: transport_maps = hash:/etc/postfix/transport transport ...
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1answer
124 views

AOL soft bounce

I don’t have much experience dealing with AOL. If someone on a shared IP address at a web hosting service got a bounce like this: example@aol.com host mailin-02.mx.aol.com [64.12.88.163] SMTP ...
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0answers
19 views

Exchange 2010 - Remove a mailbox and add a new one

I am experiencing the issue of walking into a new company as a sysadmin and no one has looked after their exchange for a long time. Because of that there is a mailbox (Lets call it Mailer) that is ...
1
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1answer
54 views

SPF errors on a new domain name

I'm new to web hosting and configuring emails, and I was hoping I could get some help. I purchased a reseller account and I set up my first cPanel account on a domain that I have. I then created a ...
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0answers
127 views

email dead after updating dns records

I was integrating with woodpecker.co which required me to set up a sub-domain on mailgun before I could integrate my email. I set up the DNS as requested and here is the result. Its from an VM ...
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0answers
93 views

Reject specific class of backscatter mails with postfix

I'm looking to reject email that is sent by mail servers thinking its a good idea to send back undeliverable messages for mails that couldn't have possibly come from my mail server. I also want to ...
0
votes
1answer
169 views

Postfix - Bounced e-mail in mailq for non-exist email account

My postfix mail queue has quite a few bounced back e-mails; however, the recipient of the bounced back e-mail does not exist, e.g. @server_hostname.example.local, so it will never be delivered and ...
0
votes
1answer
158 views

Postfix - Mails from a specific server bounces

I just set up a mail server with Postfix, Dovecot and Mysql. I can sent/receive emails to/from Gmail, Hotmail etc. but mails sent from a specific Microsoft Mail Exchange Server (using Outlook) ...
2
votes
0answers
23 views

How do I find and prevent local mail handling? [closed]

I did an apt-get update of a server "myserver.com" recently and now all emails sent from that server to email@myserver.com bounce with "user unknown". I believe that the server is trying to deliver to ...
0
votes
1answer
65 views

postfix message delivery status via web call

is there a way I can configure postfix (or any other mail solution) to call a url with the status of submission? example message with id 123efd was bounced it will call https://mailnotifiapi.com/...
2
votes
2answers
490 views

Outgoing email errors

A couple of months ago some of our emails got hacked (they got hands on the passwords) and they sent out 1000+ spam emails from those specfic accounts to random adresses. Now months later after having ...
0
votes
1answer
225 views

Unable to receive emails after domain and hosting were transferred to another company?

After my domain and hosting were transferred to another hosting company, some emails were not received by my mail accounts which are using G Suite as mail server. Sender received this email after the ...
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votes
1answer
65 views

Dedicated server IP reputation good and not blacklisted but still getting bounced? [duplicate]

I have had my dedicated server for 2 months or so, having transferred from a different, very expensive, old and slow dedicated server, for all those reasons. Initially it got onto 1 or 2 blacklists ...
0
votes
1answer
234 views

Is a Postfix “bounce back” equivalent to an “auto reply”?

I have a Postfix mail server with a catchall account. I had this catchall forwarding to another account on a separate machine/domain. I had to stop that, because I have a mail relay service in place ...
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vote
1answer
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 ...
0
votes
1answer
8k views

Postfix 451 4.3.5 Server configuration error

So I'm running mail on my VPS, using Postfix + Dovecot. I am able to send, but not all mail comes in. Note: DOMAIN = my domain, but I blocked it for security reasons. The case: I want to use my mail ...
2
votes
1answer
308 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@...