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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postfix incorrectly redirects external emails (different domain to my own) to a user on my server @ my host name but sendmail test works

Problem postfix will succesfully send emails which have the same domain name ending as the server itself emails that have a different domain name like ending in gmail.com don't get through In both ...
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Why is email sent from my AWS SES server cannot arrive on corporate-domain email, but arrive on mail service such as Gmail?

The summary: email from SES did not arrive at user's corp domain email. email from SES arrives at my corp domain email but is hosted at Gmail. email from my private Gmail arrives at user's corp ...
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Postfix user login file

I am Linux centos for my email server. I have already tried with "tail -f /var/log/mail.log and /var/log syslog". Now where can I find my email users last 1 month login logs? Thanks
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Is it possible to only generate mail notifications for some reject/defer codes in Postfix?

I run an SMTP server for important email. I'm relatively confident with my configuration at this point, but I still want to minimize any accidental mail loss; in case of any errors, all of my ...
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Postfix: how to accept then bounce emails for some domains (example: gmail.fr)

All this is specific to domains with no incoming emails at all and with no available MX. A domain may not have any MX record, that's RFC-compliant, but may have a A record that doesn't point to any ...
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How can I understand if my MX is changing the message envelope?

I have an exim4 server that forwards all input emails to a gmail account. Gmail is refusing some valid messages with this error: SMTP error from remote mail server after end of data: 550-5.7.1 Our ...
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Email still connected to former server leading to emails being rejected

I’m head of a small NFP charity. We had our website transferred to GoDaddy by a friend a year or so later we engaged a local web company to build a new website including transferring it onto their ...
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520 ip and spf record not match

We are using Google Workspace and set Email forwarding using recipient address map to forward messages at our domain name (@example.com) to an external domain name (@external.com). Ex. mail sent to ...
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Why would a receiving mail server check the DNS A record of the from domain against a blacklist?

Most (all?) of the DigitalOcean network is currently listed on UCEPROTECT Level 3 (again). I know that UCEPROTECT Level 3 is widely regarded as shady and I personally recommend to our clients that ...
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Procmail not bouncing emails

I have a catch-all email address for my domain, however I want to block certain addresses from receiving mail. Before, I was doing it like this: :0 * ^(X-Original-To): username@example.com /dev/null ...
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Postfix spoofed messages using an alias which forwards emails back to the sending domain

My Postfix installation has the following alias configured which will distribute incoming emails to the following addressees : alias@my_domain.com - goes to - me@my_domain.com alias@my_domain.com - ...
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Privacy-friendly Postfix bounce messages for remote rejects

The topic of handling bounce message for remote rejects has been brought up at least three times (1, 2, 3), and it looks as if there is no real solution. I wonder, though, if the bounce template can ...
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Postfix bounce mail without subject nor from address

I have a problem with my postfix servers. When I send an email to an non-existing domain or mail address I get a bounce mail (which is normal) without From address nor Subject. I tried to create my ...
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How to avoid emails sent to Google's deep web crawler

My website has an area restricted to users who sign up with a valid email. I have got requests with bogus emails, and I want to avoid sending emails to non-existent addresses lest they increase the ...
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2 answers
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What exactly can I conclude from "High scoring spam message has been dropped (in reply to end of DATA command)"?

I operate a web site that offers user registrations. Users get automatic registration success e-mails, sent through a professional e-mail hosting company (not directly from our own server). This has ...
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Safe to assume emails are getting through if they're not bouncing back?

I am setting up an email server on Debian 11 with Postfix, Dovecot, and Roundcube. I am able to send emails FROM Roundcube to a gmail address I control. When I reply to the email sent from my server ...
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How to route/forward a specific email account from one Email Provider through Microsoft O365 Exchange Servers

My company has around 10 custom domain email accounts that were included our website's hosting plan. Our website sends out at least 300 emails a day in response to customer's requesting quotes for our ...
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How to verify if an email was received and read

I accidentally sent an email to a wrong email address. The owner told me that he didn't receive my email because there were no email servers configured for that domain. However when I did MX lookup, I ...
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550-5.7.26 Unauthenticated email from domain is not accepted due on ERP only

I have made updates to our mail server to use DMARC. So after This our ERP system cannot send emails to gmail.com or yahoo.com but Outlook sends emails with no problems. Below is the header for an ...
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-1 votes
2 answers
446 views

My Exchange generates "Mailbox full" for recipient's mailbox but it isn't full

When I am sending an email to user@example.com then my Exchange Server 2010 [14.01.0438.000] rejects the email with the message that the recipient's mailbox is full. I contacted the company and they ...
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2 votes
2 answers
1k 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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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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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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-1 votes
1 answer
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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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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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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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-1 votes
2 answers
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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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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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-1 votes
1 answer
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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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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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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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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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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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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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2 votes
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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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2 answers
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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 ...
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1 answer
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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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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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3 votes
1 answer
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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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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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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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0 votes
3 answers
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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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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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3 answers
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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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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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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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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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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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3 answers
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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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