Questions tagged [email]
The server configuration of email, including POP3, SMTP, IMAP, and popular server software packages that control email.
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connecting to webmail [closed]
I have an application (opencart) on cpanel (shared hosting).
When I try to submit an order it uses smtp to send emails to notify both admin and user of the purchase but according to the logs it cannot ...
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Redirect SSMTP emails from a computer to another email server
I was following this article on setting up a Mail Relay from one server to another, as I want to redirect all the system email, such as crontab errors from Server1 to Server2.
In order to do this, I ...
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AWS-SES sending from one site, from is another site - will DMARC help or hurt
Alright, to keep this simple:
I have a project that is using AWS's SES to send transactional emails. The project is hosted on one site (let's call it example-site.com), but for reasons, the From: is ...
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Grafana - Have a View Panel button on email notification
I'm switching from Grafana 8 with legacy alerting to Grafana 10.3 with the new unified alerting system. I'd like the email notifications to have buttons to access the dashboard and panel linked to the ...
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Exchange 365 can't send as alias
We're running Office 365 for a company. In Exchange admin, I have all domains added, I did enable "Send email as aliases" in Mail Flow settings, and I have added alias to my email address in ...
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How can I make MIAB automatically copy all mail sent via SMTP into the sent folder of the sender's account?
I run Mail-In-A-Box on my mail server and one of my clients is using a specialized application to send messages via SMTP from their account on my server. When they used their own Gmail account to send ...
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SPF failing even though source IP is in the SPF record
I've seen (and think I understand) when DMARC checks fail on SPF because, e.g. the email has been forwarded and such like. But I don't think this is the case here. All checks on sites like MXtoolbox ...
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Adding SPF records when using both Google Workspace and SendGrid
I previously didn't have any SPF set up on my domain. I use Google Workspace. I now use the SendGrid API.
This is what I set as the SPF record
v=spf1 include:_spf.google.com include:_mailcust.gandi....
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postfix bounce_queue_lifetime and maximal_queue_lifetime
i have done a lot of research but still cannot clearly understand what is the difference between postfix bounce_queue_lifetime and maximal_queue_lifetime in main.cf. Although I've read a lot of ...
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Linux system mails alternative for sending and receiving besides SMTP
I have multiple EC2 servers which run either Ubuntu or Amazon Linux. I want to run automatic system updates but get a message when the system is updated. The yum-cron package can send emails, but I do ...
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senderscore.org reports volume 15 time higher then what we actually send
We've encountered a problem with low score (it's actually zero now!) in senderscore.org and as a consequence our service provider want to termintate our service. According to postfix logs, we send ...
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Email from any outside domain bounces back with 554 5.7.1 Relay access denied error
i have setup postfix 3.6 on my ubuntu 22.04 vps (cyberpanel) with dovecot and roundcube as my webmail. i managed to fix outgoing emails but now, i am getting relay access denied errors. this is my ...
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Phishing email but with SPF, DKIM and DMARC in "PASS" status
I received an email from a company that looked fine. Gmail deemed it ok. I checked the domain and the various DMARC, DKIM and SPF headers: they are all in "PASS" status. The sender's IP also ...
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Local Server connection to internal Mail-Server and SSL
I work in a company that has a pretty strict policy regarding the separation of internal and internet. I got a server for our branch office, I have a static IP for our internal network but no domain. ...
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Postfix sending duplicate emails under different userid's, how to fix?
I can't find a reason for it in the postfix settings, but duplicate emails are being sent, under different uid's. Looking at the email headers, they have unique ids, and each with a different Postfix, ...
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User Coverage for Microsoft Anti-Phish Policy
We use custom threat policies for anti-phish and anti-spam in Microsoft Defender, and Security Center's remediation list is showing us that 56% of users are covered by the custom policy, and 44% are ...
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How to make Postfix hand off emails via LMTP to Dovecot better (virtual vs relay)?
There are 2 ways how Postfix can hand off emails via LMTP.
The first approach is recommended by Kyle Dent in his book about Postfix. He suggests it in cases when we want to store emails in a ...
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Email Routing is currently disabled and not routing emails. - but... it is working
Im using cloudflare as my domain host and google business email.
We have not had any noticable issues receiving or sending email, however when I logged into cloudflare today I see the error message in ...
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Cannot get Exim to verify DANE for remote smtp
I am trying to configure Exim to try DANE before deciding to deliver unencrypted mail to remote hosts.
My general Exim configuration has: dns_dnssec_ok = 1.
For the dnslookup router: ...
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Abuse report attack on AWS SES
An application that runs on AWS uses SES to send verification emails to new customers. An attacker signs up to the website and reports the verification email as abuse.
I'm wondering what options are ...
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Sending email with postfix on a specific IP address fails. Error 81126 with Gmail
Recently, I started to receive errors from Gmail:
host gmail-smtp-in.l.google.com[142.250.110.27] said:
550-5.7.25 [X.X.X.X] The IP address sending this message does not have
a 550-5.7.25 PTR record ...
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Out of Office was setup on an email which is now an alias; anyway to remove that out of office?
We have a user who a few months ago went through a process of condensing the multiple email addresses they had (All of which had their own associated mailboxes) into one email address. The past email ...
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Is 8bit Content-Transfer-Encoding Considered RFC 5322 Compliant?
What I'm trying to ascertain is whether or not emails containing 8-bit characters (in the range %x80-%xFF) - which could appear in messages or sections with a Content-Transfer-Encoding header of 8bit ...
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How to capture incoming emails on exchange before they reach transport agents?
I'm trying to debug why some inbound emails are failing DKIM checks. I'm running the latest version of Microsoft Exchange server 2019 on Widows Server 2022.
I have enabled pipeline tracing via the ...
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DKIM settings with Amazon SES not finding primary domain
I'm attempting to send email via Amazon SES with a custom domain. I have one domain that works and the DKIM headers that come to my gmail account look like:
Authentication-Results: mx.google.com;
...
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How do I cheaply split emails between different servers dependent on the user its sent to?
I'm helping a friend start a small business, he wants an email on his domain ([email protected]) to have access to Google Drive storage to be able to upload files and share them with clients.
He also ...
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Can I have more than one public keys saved in one selector for dkim?
The question is easy to understand, but it might be confusing. I understand that I can host multiple selectors for a DKIM record, but just out of curiosity, can I have multiple keys per selector in a ...
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How to send email from smtp server1 to smtp server2 (Postfix) via client?
How to make server1 with postfix can send email to server2 with postfix by redirecting DNS query to it (type forward). These servers are on the same local network. Server1 is to receive a non-...
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Is it a good idea to add `calendar-server.bounces.google.com` to my SPF record?
I'm trying to maximize my company's email deliverability and DMARC reports tell me we are failing DMARC SPF alignment with calendar-server.bounces.google.com which I suspect is the email server ...
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How can I filter incoming email and then forward to another MX server?
Currently, I have an organisation set up in Gmail with a custom domain. I’d like to pre-filter all emails being received at that domain - think a transparent email proxy if you will.
My DNS MX is ...
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Weird email spam issue. Google Domain Exchange email server
We have a client who is blocking our email domain.
Their IT wrote this to us. I've never seen this be an issue before.
You are hosted on Google but have entries referring to Microsoft email protection ...
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Postfix/Dovecot presenting default SSL certificate from Apache to Thunderbird client
I've been struggling with this issue for some time now.
I want thunderbird to get the certificate for mail.******.cl, but it always seem to get ******.cl.
So I've done a couple of tests, and realized ...
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Using Dovecot on Linux as an email archive repository
I am helping a company who has recently moved from one host to another. The new host has an 4.48gb limit for email which the companies emails fills. They don't want to lose the older emails but they ...
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Postfix+Dovecot: emoji in subject from command line break the delivery ("SMTPUTF8 is required, but was not offered"), works from Gmail
Tl;dr: if I send an email to my Postfix+Dovecot server with the subject containing UTF-8 characters
email from Gmail => Postfix+Dovecot deliver the email correctly
email from mail (command line) =&...
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Mail signature invalid because of encoding of dots in quoted-printable mail
This is a repost so i will link the post:
https://security.stackexchange.com/q/274208/227343
I‘m sending a mail encoded with quoted printable encoding that contains some dots „.“. There is a problem ...
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Mails invalid signature because of encoding of periods in quoted printable
I‘m sending a mail encoded with quoted printable encoding that contains some dots .. There is a problem with a specific mailserver/customer. For some reason, they receive the mail in such a form that ...
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How do I view mail (postfix?) configuration settings?
I inherited a server that is mailing status messages via an external mail-server. It runs crontabs that run scripts that send mails. Example (simplified):
echo "disk free status 10GB" | ...
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Exchange Server: Is it possible to find out which user marked an email as read?
We are running a self hosted Exchange 2016 Windows Server 2016 Datacenter.
There is a shared mailbox used by multiple users.
Users have been told to mark emails in this account only in special cases, ...
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PHP PEAR Mail STARTTLS failed error 220 with postfix
I'm running postfix with dovecot. I'm trying to use the PHP Pear Mail package to send e-mails, but I can't get it to work. The error I get is this: authentication failure [SMTP: STARTTLS failed (code: ...
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Why is PTR needed in DNS, instead of using a service record or an MX record?
Why would an organization with an email system have a requirement that a system sending email to it needs a PTR reverse lookup DNS record of the IP address of the sending email server?
Can the ...
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Why Google SMTP MTA's are not sending STARTTLS command
I'm a software engineer that wrote my own SMTP delivery agent. I recently added the STARTTLS support to my software and I was doing some testing, when I noticed that Google's SMTP transfer agents are ...
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Emails sent from my server are being flagged by SpamAssassin with the -1.274 RDNS_NONE
I'm experiencing an issue with email delivery where SpamAssassin is flagging my emails with the RDNS_NONE result. I suspect it's due to a mismatch between my Reverse DNS (rDNS) and HELO settings, but ...
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PTR record with multiple sending domains
We have a set up with two dedicated IP addresses that send e-mails from multiple domains. As an example, the dedicated IP addresses are 192.0.2.1 and 192.0.2.2, and the domains are example.com, ...
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Something sends email to OpenDKIM even after purging it
I can't send email from my server using Postfix. The /var/log/mail.log has:
postfix/local[1803]: 59367CDB9: to=<[email protected]>, orig_to=<opendkim>, relay=local, delay=0.03, delays=0....
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Domain name migration: avoid phishing warnings
I'm migrating email domains, so that all users will change from [email protected] to [email protected]
One thing we've discovered while testing is that certain email providers (especially Google) will put ...
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Will this work? Adding an alias domain and moving primary domain MX to M365
We have a special extenuating situation. We have a business we've had for 20 years using example1.com and we're being forced by our contract to switch and use M365 encrypted email but the entire ...
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Incorrect dmarc record landing some mail in spam
I have just received notice from one of our partners that some of our emails sent via AWS SES are being flagged by their email provider as potential spoof DMARC.
We used route 53 to add all our DNS ...
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what comes first smtpd milters or cleanup in order of filtering in postfix?
Based on the documentation of the postfix (as stated here: 'https://www.postfix.org/SMTPD_PROXY_README.html') the smtpd milters should be used to filter the emails first and then the cleanup service ...
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Will Microsoft 365 fail new Gmail "Email sender guidelines" re: reverse DNS check?
Gmail recently published new "Email sender guidelines" which will be enforced from February 2024. https://support.google.com/mail/answer/81126
In "Requirements for all senders" it ...
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How to send mail using this smtp server?
The SMTP server is set up as this.
hasAuthorization: Y
username: [email protected]
password: mail@password
senderEmail: [email protected]
properties:
mail.smtp.auth: true
mail.smtp.host: ...
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