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Questions tagged [email]

The server configuration of email, including POP3, SMTP, IMAP, and popular server software packages that control email.

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23 views

Email Proxy or Email Relay? Which is Best? Which Server Should Store SSL Certificates, Mail Relay or Mail Proxy? [on hold]

I am new to ServerFault and this is my first question and I am posting this here as I was unable to find adequate information on internet. I want to setup a Postfix Email Server on Debain environment ...
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18 views

SMTP solution for server notifications, transaction emails, form submissions

hope I'm in the right place. I host a number of clients on a VPS setup. Many have WordPress installs using with contact forms, along with various security plugins which send notifications. Many ...
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0answers
35 views

Tracing a Fraudulent Email

Recently someone has been posing as the head of the organization I work for asking for iTunes gift cards from employees. Its a very obvious scam and no one has fallen for it, but the scammer has ...
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12 views

Sendmail redirect copy of all incoming mails to another server

I am migrating from a server running sendmail 8.14.3 to a postfix server. In order to ensure a seamless transition, it would be best if incoming mails are delivered to both servers simultaneously. I'...
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1answer
16 views

Exception to wildcard postfix catch alias to let dovecot store email

I have configured postfix to read alias maps from PostgreSQL (virtual_alias_maps = pgsql:/etc/postfix/pgsql-virtual-alias-maps.cf ), every domain I've configured has a wildcard/catch-all rule. ...
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0answers
5 views

Postfix sender_dependent_default_transport_maps with throttling for specific domain

Is it possible for postfix using sender_dependent_default_transport_maps for the IP mapping, but also throttling for a specific domain using transport_maps for the main.cf ...
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3 views

Local postfix server deferred Cogeco email [on hold]

I've setup a server at home to run my websites, and among other things, email. I'm with Cogeco (in Canada) and they don't allow personal servers so incoming port 25 is blocked. I've setup incoming ...
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32 views

Shared Mailbox mail flow issue in Office 365

Interesting problem with inbound emails to a Shared Mailbox on Office 365. We are a unique company that manages various admin functions for a handful of sister companies. We're having inbound mail ...
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1answer
41 views

Setting SPF record for mail relay servers to avoid softfail

I have an issue with correctly setting the SPF record for my own domain. Initially my DNS settings as set by the domainhoster were as follows: @ TXT "v=spf1 mx ~all" @ MX 10 mx101....
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1answer
24 views

What is preferred way to deal with job email accounts

Like most companies, we have departments with dedicated staff. We want to set up job email addresses, like accounting@ and sales@. These emails should be seen by multiple staff members. What is the ...
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1answer
30 views

Forward mail using qmail to multiple recipients dynamically

I am trying to forward an incoming mail to multiple recipients. The recipient's addresses are stored inside a mysql database, so I need to call a script to get the addresses before forwarding the mail....
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0answers
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saving email messages attached to an email as individual messages in Evolution? [migrated]

I sent an email to myself containing several email messages as attachments. I would like to save the attached emails as individual messages in my Evolution inbox, so they appear as any other email ...
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2answers
45 views

GSuite: “There should not be a mail exchanger set up on naked domain name”

I checked my domain name with GSuite's MX tool to find out why our email gets to Spam folders, and have resolved the main issues (SPF and DKIM entries were missing in our DNS settings). The last ...
0
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1answer
19 views

Remove meassge-id exchange

we are planing to remove message-IDs from all incomming mails on our Exchange server. The reason is our SPAM-Filter which redelivers content-filtered mails with the same message-ID as the orignal ...
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0answers
30 views

My postfix server rejects my python script - “Client host rejected: cannot find your hostname”

I have a postfix on a server. When I'm trying to send an email from my python script, it gets rejected due to "Client host rejected: cannot find your hostname". How to allow an email come through? If ...
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1answer
52 views

SPF on Office 365 - Can the return-path address be spoofed by another Office 365 sender?

I'm not an email expert by any stretch, so please forgive my lack of correct terminology. My understanding of SPF is that mail servers that receive mail will look at the return-path domain, and check ...
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1answer
11 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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39 views

Redirect outgoing email from postfix for testing base on destination

I have set up a testing server for a web app that sends out email notifications. Since this is a testing environment I have set up postfix to redirect all outoing email to a single testing email ...
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1answer
25 views

Does an SPF SoftFail trigger DMARC reject

I've googled around and even tried to find the answer in the RFC to this one. For this question, let's assume DKIM will always fail and leave it out of the picture. If the DMARC policy is p=reject ...
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1answer
66 views

Recovering deleted plain text (emails) files from raw disk image

I'm hosting my own linux mail server for my family. Yesterday my father lost all the mails in his Inbox folder. I'm still not sure whether it's due to a terrible user error or compromised password, ...
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0answers
62 views

What causes this email sent from Outlook Mobile to display as Chinese/Japanese characters in iPhone mail app?

I've attached the actual email chain below, redacted and de-identified as much as possible. UserA sent an email to UserB. Sent from Outlook mobile on iPhone. UserB complained they could not read the ...
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1answer
23 views

how long can deleted emails stay in recoverable items folders in Archive mail box?

I notice there is a retention tag can help you move emails from recoverable items folders in main mailbox to recoverable items folders in archive mailbox. May i know default how long can it stay in ...
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1answer
43 views

Recipient address wildcard support in AWS SES

The question is similar to this one; When receiving email via SES, it would be helpful to have some basic wildcard support when generating receipt rules. We have a use case that relies upon ...
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2answers
24 views

How does yum-cron send emails from localhost?

I have an amazon linux 2 server running in the aws cloud and I have yum-cron running on it. I have an email domain mydomain.com which is running on a separate server in a completely different cloud ...
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1answer
30 views

chaining email forwarders (forward an email to a forwarded address)

We can forward a forwarder to an address that is itself forwarded: first_address@example.com -> second_address@example.com second_address@example.com -> third_address@example.com third_address@...
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1answer
34 views

Move to another email server by changing the DNS entry

I ended up in charge of an email migration. My company wants to migrate from their own privately hosted email server to an office 365 server. This is not about saving the old emails on the old server. ...
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0answers
20 views

Change the headers in postfix

I need some help with configuring on my vps. I am using postfix software to send the email and when I send the email from my server using PHP, I can see the localhost in the header which it show like ...
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1answer
25 views

Setting up a global PTR record for entire server

Digital Ocean droplet running CentOS 7 with Plesk Panel installed. Trying to improve the email deliverability and overall state of the mail server. Want to set up a PTR record and apply this to the ...
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1answer
54 views

Emails go to spam ( Reverse DNS is set , DKIM pass , SPF pass , DMARC pass ) [duplicate]

It's been now 3 days that I am struggling with configuring my emails to go to the inbox. I have a VPS server at OVH and a domain name. I have configured everything in virtualmin with OpenDKIM and ...
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1answer
29 views

Roundcube - how to enable user registration?

Can anyone tell me if there is any possibility to enable some feature that allows users to create new e-mail accounts ?
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1answer
33 views

How do you match a forwarded gmail address with procmail

When Gmail forwards an email to an external address, it apparently inserts the forwarded address into the FROM line. So an email being forwarded to username@school.edu by username@gmail.com becomes: ...
2
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0answers
37 views

How to restrict the addresses in MAIL FROM?

Good Nighttime, I've a postfix server combined with a mysql-database for address management. There is a table mapping the users and their mail addresses. e.g. |user|mail@domain.tld| |user|mail2@...
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17 views

Postfix error: unsupported dictionary type: mysql [duplicate]

I get this error in Postfix mail server: Nov 18 18:47:38 mail postfix/proxymap[26926]: error: unsupported dictionary type: mysql Nov 18 18:47:38 mail postfix/proxymap[26926]: message repeated 4 ...
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0answers
12 views

Mail messages sent reaching spam [duplicate]

I have set up a Debian server, following the Perfect server guide, including Dovecot. Everything runs fine, except the fact, that most of the mails sent out of the server are reaching the spam ...
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1answer
24 views

Reverse DNS PTR entries matching to MX entries

Confusion over what reverse DNS applies to and where it gets set... Although there are answers on how to do this, I still cannot determine what needs to get done and why. A domain is registered at ...
1
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1answer
24 views

DKIM : Which domain is considered?

DKIM verifies the domain of an e-mail sender, but... What "domain" does it check? The "domain" of the MAILFROM field of the SMTP envelope ? The "domain" of the FROM header of the message ? The "...
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2answers
59 views

Prevent using spam trap e-mail address on registration

I am running a website where the users register using their e-mail addresses and receive a confirmation code before they can log in. (After this every contact is opt-in.) Every now and then some user ...
1
vote
1answer
105 views

EMAIL in Compute Engine

First of all, I apologize for my ignorance (and my English), but let me explain my problem: I read that GCloud does not allow sending emails and they suggest to use Sendgrid, Mailjet etc. I chose ...
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0answers
29 views

Can SPF record include multiple A domains

Hello would this be a valid SPF record for domain1.com using a records from different domains? v=spf1 a:mail.domain2.com a:mail.domain3.com -all This question is similar but uses the include and not ...
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1answer
25 views

How outbound SMTP gets encrypted by the client?

When my SMTP server sends an email to another server and is supposed to use TLS, the receiver will offer his destination domain certificate (I assume). Which certificate does my server use to encrypt ...
2
votes
1answer
31 views

Utilize AWS SES as an Inbound Mail Gateway

I am trying to use SES to intercept an incoming email for a domain, do some processing and manipulation of the email with a lambda, then would like to continue sending the email to the final ...
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0answers
27 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 ...
4
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1answer
49 views

Sender Score Low

We host our own email server and have discovered we have a low sending score that is causing delivery issues. From the report (senderscore.org), there is an IP address outside of the U.S. (email ...
0
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1answer
33 views

Exim Find Total Number Of Emails Sent Within Last 24 Hours On Per User Basis

Want to go through exim logs for past 24 hours and sum up total number of emails on per user basis, please suggest me command(s) I know how to view emails currently in queue.. but I want to find ...
0
votes
1answer
47 views

Open Port 25 for Message Receipt Only in Postfix

I have configured Postfix as an SMTP server, running on a non-standard port, using TLS, with relay. However, I want to add the ability to receive mail directly to the user accounts on the system, and ...
0
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0answers
24 views

Bounce all emails with tracking pixels: G Suite mail server

I'm trying to bounce every email that has a tracking pixel in it. Can it be done with a G Suite server for all people on our domain? Ideally it'd also send a message explaining our company does not ...
0
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1answer
12 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 ...
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0answers
38 views

Exchange 2016 and OWA: remove duplicate emails

I've installed an Exchange 2016 server with a lot of mailboxes. Now i'm migrating the emails from the old server to Exchange. So, create .mbox file, convert to PST and then import PST. I don't know ...
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votes
1answer
33 views

Putting an e-mail domain to blacklist

Is it possible for us to put a specific e-mail domain to blacklist? I know you can personally tag and report as spam/scam e-mail for the incoming ones (to a specific email address, more like ...
0
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1answer
31 views

Mail sends fine but returning 504 error

I noticed all of a sudden that any operation that has to do with sending email on my site returns with 504 server timeout page. Fortunately, the email gets sent but returns a 504 error. I went further ...