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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.

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.

Bounces can result from unknown users, failed mail servers, or other network or configuration issues.

402 questions
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Hotmail and Live.com rejecting all emails

I have been having problems sending emails from my server to hotmail.com and live.com email addresses. I have read other posts on serverfault but they have not been helpful. Here is the error message. It is very vague 550 SC-001 Mail rejected by…
user16517
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Do out-of-office replies get sent to the return-path header?

I always thought that the return-path header was used for bounced messages, so I have my email newsletter software setup to unsubscribe anyone whose email address replies back to the return-path email address. But recently some users started telling…
Brian Armstrong
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Indirect Postfix bounces create new user directories

I'm running Postfix on my personal server in a data centre. I am not a professional mail hoster and not a Postfix expert, it is just used for a few domains served from that server. IIRC, I mostly followed this howto when setting up Postfix. Mails…
hheimbuerger
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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 DNS server since our records currently show…
user3645994
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Disable bounce in Postfix after failed mail forwarding

I have some mailboxes in Plesk/Postfix that redirect to some external addresses. If Postfix fails to forward a message to these addresses, it bounces back to the original sender, who is a fake address most of the time. How to completely disable…
Antares
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How to forward anything@subdomain.domain.com to anything@domain.com

Scenario Our company has two web servers. Our main doman, domain.com is hosted offsite using a hosting provider (In this case, Netfirms). One of our subdomains, subdomain.domain.com is hosted onsite and is reached via a CNAME entry in the DNS…
Sirach Matthews
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Disable the sending of "Undeliverable Mail Returned to Sender" in Postfix

I have searched for this question already and found this question but the basic question was never answered. How do I completely disable Postfix from sending undeliverable notifications? I want to do this temporarily because we are in the process of…
bistromath
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Mailgun emails are rejected everywhere but on Gmail

My problem and Mailgun logs I've "setup and verified" (see context) my sending domain with Mailgun, so I could use it to deliver my contact/order forms via Mailgun API: https://github.com/mailgun/mailgun-php After successful verification (according…
Petr Cibulka
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Prevent misdirected bouncebacks from forwarding server

Note: This question is a duplicate of Avoid creating backscatter on a Postfix forwarding server, for which the only answer was "sorry, nothing you can do", but I provide more detail here, consider more options, and would also like to know if newer…
Arnon Weinberg
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Delivery Status Notification (Failure) => 550 SPF: x.x.x.x (IP address) is not allowed to send mail from

Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the server for the recipient domain by . [192.185.87.85]. The error that the other server returned…
gvasquez
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disabling postfix "Undelivered Mail Returned to Sender"

Is it possible to disable the postfix notification "Undelivered Mail Returned to Sender"? Since I receive too much spam with forged senders, I don't want postfix to notify these forged senders.
jbastos
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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 message_size_limit configuration option. This however…
marabunta2048
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SMTPD restrictions

I'm looking for a bit of advice on Postfix restrictions configuration. I'm looking for a balanced configuration which properly rejects spam and unauthorized access retries. Lately, I've been reading some docs and trying to learn from other's…
peris
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Postfix: Reject reject_unknown_recipient_domain and receive instant email notification

when an email is sent to a non existing domain or recipient, i would like the sender to receive an immediate email from mailer-daemon informing the recipient does not exists. Actually, what happens on my system is the email gets in the deferred…
peris
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Postfix: Resend 'hard' bounces

I had a number of messages get rejected by the recipient's mail server with a status 550 code due to an IP address blacklist. I've sorted the problem that caused the host to become blacklisted, and removed the entry from the blacklist. I'd like…
aroth
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