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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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2answers
63 views

Gmail is blocking email from my IP

I've had a virtual private server for close to 6 months, and I'm going to start sending emails to users from noreply@mydomain.com. My handful of email tests so far have all resulted in a bounce ...
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0answers
59 views

Do spam filters care about the reputation of the “A” record

I have a domain set up and an email address hosted with a third party provider (Zoho). Whenever I send an email from this domain (mostly just personal emails, no mass marketing or anything like that) ...
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1answer
54 views

Mail Bounce due to Invalid string MX record

I'm new to managing a mail server and I encounter an issue with sending a message to a certain domain. Our emails are bouncing back on us with the error of the Invalid MX record string. I'm using ...
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1answer
50 views

How to resend bounced email messages using mutt

Background An email relaying issue was resolved. 32 email messages to sponsors had bounced to root. I copied /var/mail/root to /tmp/root. I deleted irrelevant messages from /tmp/root (using mutt). ...
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0answers
21 views

postfix limit sending rate PER MX domain?

I know postfix can limit concurrent connections to recipient "domains", but I am sending emails to websites from different domains that may use the same email service (Google, Outlook, etc.) ...
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0answers
234 views

Why are some emails not reaching my inbox?

I'm very new. I set up email on my domain (postfix, dkim, dmarc, spf, dovecot... s-nail, Roundcube) by following reliable guides. I now have 9 addresses, 3 different FQDNs. Emails from all addresss' ...
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0answers
15 views

Postfix bounceback email forwarding

I have configured /etc/postfix/main.cf and /etc/postfix/virtual so that any inbound mail sent to address1@localdomain is forwarded to address1@customerdomain. There are multiple mappings to forward ...
-1
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2answers
23 views

Barracuda Bouncing Emails

I'm not too familiar with all the intricacies of email servers and am curious what you guys think this looks like. Is the receiving blocking it or is this something on our end? The receiving company ...
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0answers
11 views

DirectAdmin treats incoming e-mail as if it should not be delivered locally, but as if it should relay this e-mail

Our VPS with DirectAdmin does not receive any email anymore. All sent mails to this VPS are bounced with a message 550 Authentication required. The server treats incoming e-mail as if it should not be ...
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0answers
220 views

Bounced Email / Invalid MIME Content

Has anyone seen a bounced email because of the header size? My Cisco Ironport appliance receives the following NDR when sending emails to Office365. bounced by destination server. Reason: 5.3.0 - ...
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1answer
27 views

Different email acount on different MX priority

Say you have the ff. email server: server1.com has the mailbox foo@example.com server2.com has the mailbox bar@example.com If the MX priority settings are: Priority: 0 Destination: server1.com ...
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0answers
15 views

postfix enable sending bounce messages to sender

I currently trying to enable sending mails to the sender then the mail is undeliverable. For example the mx1.my.domain which is the MX for my.domain recieves a mail for person1@my.domain: 868942A: to=&...
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1answer
187 views

Postfix: How to check if my email headers are RFC5321/RFC5322 compliant?

We are running a Postfix MTA (version: 3.4.14, OS: Debian 10) and since a short time emails sent to a certain provider (Web.de/GMX) are not being accepted anymore (the emails are sent by an ancient ...
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0answers
146 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. <real@example.net> (...
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1answer
203 views

Exchange 2010 distribution group, NDR message not being sent to original sender, when unauthenticated option in place

We got a requirement to reject external emails sent to one distribution group (test_dl1@xyz.com) using exchange 2010 transport rule in this manner. (and send NDR to the original external sender) We ...
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1answer
36 views

Emails sending with postfix fail to outlook emails but success with gmail

I have set up postfix server. I am testing my email sending . i can send to gmail but all outlook mails are getting rejected, may i know how can i fix ? Any config i have to change ? Nov 27 10:35:15 ...
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1answer
40 views

Postfix not receiving bounce mails

I am using Postfix to only send Mails out (via my noreply mail), which works great. I would like to use my support mail, which is running on the server of my mail provider, to receive user replies and ...
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0answers
42 views

disable case folding for pcre alias file in Postfix

As I described in my last question I'm suffering form an issue caused Postfix to doesn't recognize local user account with capital letter! I red some manual page of Postfix and ran into a quote saying ...
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0answers
147 views

Postfix bounces incoming emails with uppercase recipient (unknown user)

I just installed Postfix on Debian minimum server and configured it as below: installation: installed it chose internet site set name to mydomainname.com /etc/postfix/main.cf configs: changed ...
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2answers
167 views

Exchange 2010 rejecting some Gmails

My work Exchange server just recently started rejecting some emails sent from Gmail accounts. Some emails sent from Gmail accounts come through just fine. We have our spam protection through Google ...
0
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1answer
210 views

Might “Require TLS Encryption” in Exchange mail-flow rules cause compatibility issues for e-mail?

Picture of how I'm forcing TLS. This is essentially forced TLS. Should "Require TLS Encryption" be required for microsoft exchange mailflow rules? I'm worried about compatibility issues, e-...
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1answer
25 views

Is it a good practice to bounce noreply@domain? Or rather stick with automated reply?

I notice a lot of our users are replying to our automated noreply email with actual questions that should've been sent to either of our offices. This does not include the client's autoreply software (...
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1answer
717 views

Is it a DMARC failure if disposition=none & dkim=fail?

When I get one of these DMARC reports from Google is it because there is a problem? Or is it standard protocol. I am curious because I sent one test email and got this DMARC report to abuse@...
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1answer
80 views

VERP: rewrite from header of NDR?

We provide cmail delivery for external clients from several different domains. We rewrite the envelope sender (AKA: "SMTP MAIL FROM","Return-Path" ) using a form of VERP. Thus we ...
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1answer
496 views

What is causing bounceback “550 Blocked” from Mimecast?

Reading Mimecast's FAQ: https://community.mimecast.com/s/article/Mimecast-SMTP-5xx-Error-Codes-573763479 Error 550 with reason "Blocked" is not listed in their FAQ. I have called Mimecast ...
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3answers
151 views

Forwarding eMails from Exchange to Icewarp bounces back, but not via distribution list

we are testing heavily Icvewarp as replacement for our outdated Exchange. Unfortunatly there is nearly no docu around in the internet, which makes it not easy :-( We have now set up the Icewarp ...
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0answers
19 views

Postfix Conf - Unknown user

Can't receive emails for virtual users but they can send. UNIX users that can receive and sent. What am I doing wrong? root@localhost: postconf -n append_dot_mydomain = no biff = no ...
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3answers
448 views

450 4.7.25 Client host rejected

On #Exchange2013 I am getting the error message as follows, generated the error '[{LRT=};{LED=450 4.7.25 Client host rejected: cannot find your hostname, [xxx.xxx.xxx.130]};{FQDN=};{IP=}]'. I am ...
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0answers
19 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 ...
0
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1answer
311 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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0answers
59 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
453 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
42 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 ...
0
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3answers
851 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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2answers
552 views

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 ...
1
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1answer
1k 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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0answers
141 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 ...
0
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1answer
49 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 ...
2
votes
3answers
405 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@...
0
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1answer
264 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 ...
0
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1answer
64 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 ...
0
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2answers
224 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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0answers
15 views

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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0answers
181 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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0answers
371 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
821 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
22 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 ...
7
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1answer
4k 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 ...
4
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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 "...
0
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1answer
334 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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