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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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Some users seeing unformatted emails with winmail.dat files while others aren't

We have a hosted BitBucket instance that is sending emails via SMTP through Exchange 365 to external users. Some of those users are seeing the properly formatted emails when looking at them in Gmail. ...
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How to setup auto-configure email for Android Mail app on your server?

I work for a local ISP, Web and Email Hosting provider. I've been able to setup autoconfig/autodiscover and .mobileconfig for Thunderbird, Outlook, and IOS, respectively. This covers most of our ...
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2answers
22 views

Multiple SPF entries in same or separate TXT records

I want to use a mass mailing service, e.g. sendgrid, mailgun, etc. And so I must update my zone file to include the correct SPF records. Suppose my domain is example.com. My DNS provider ...
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14 views

Emails from my server are considered as spam on hotmail [duplicate]

Well all is in the title. How to be removed from their spam list? We don't use external email provider for now. We respect emails good practices: signed email, unsubscribe link, dest email... Here ...
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5 views

Postfix sender_dependent_relayhost_maps by forwarding address

Currently I am running a postfix server that acts as an mta for 5 different brands. Each domain attaches to a different network interface on the machine. Currently receiving mail works fine and ...
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22 views

Postfix header_checks in psql

In Postfix is it at all possible to perform header checks based on a PSQL lookup? I haven't found anything explicitly saying you can...but also haven't found anything supporting it. Ideally, I want ...
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1answer
30 views

Once SPF is correctly setup is it normal for spoofed email to go to spam folder or should Gmail deleted them?

In the spam folder of Gmail can be found illegitimate spam emails apparently sent from my own domain email address but from an origin not allowed by SPF. The domain is on G Suite emails. SPF is ...
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1answer
27 views

Mx records point to gmail; postfix mail sent direct from server marked as spam by gmail, yahoo

I have an Ubuntu 14.04 server with postfix installed. However, I have set up the domain MX records to point to a Google apps' configuration, as per Google's instructions. All works fine using email ...
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1answer
35 views

Email migrations from office 365 to gsuite

Want I want to do: I want to migrate emails from office 365 to Google suite, is it possible that I add the same domain to Google suite, create the users' emails before I begin migrating? Without ...
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35 views

Dedicated IP for low volume transactional email?

I have a website where customers pay to access online training. During the training we need to prompt the customer a handful of times via email which gives us a total of between 500 and 1000 ...
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1answer
18 views

Unknown non-local mail is being sent from Postfix?

I'm keep seeing these lines in the Postfix maillog, from serveral unknown non-local email-addresses: Oct 3 08:47:32 srv04 postfix/pickup[86325]: F020C5C1101: uid=80 from=<noreply@example.se> ...
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SPF fail vs. soft-fail pros and cons

Question What are the advantages and disadvantages of using Fail vs. a SoftFail in my SPF record? What I found on the topic Back in 2007, knowledgeable-seeming folks seem to have said SoftFail was ...
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30 views

E-mail flagged as spam - maybe Exim/header problems? [duplicate]

Even implementing MX, SPF, DMARC and DKIM, whenever my server send an email to any Microsoft mail domain (Live, MSN, Outlook, Hotmail), it ends up in the junk folder. The other email services such as ...
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14 views

Managesieve roundcube - retrieve original email subject and body with {tags}

I am using roundcube with managesieve plugin, and have setup a Vacation message. I would like to know if there is an option to retrieve the subject of the original email send by a user to be used ...
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29 views

Email Server Setup with VPS and Godaddy Domain

I am trying to set up an Email Server to send emails to all my clients/buyers at once and for this I have purchased a step-by-step guide from someone which I followed to set it up but unfortunately I ...
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1answer
54 views

Error: SPF record must be in the correct format

I need some help with set up the SPF record. When I created the SPF record just like this: v=spf1 a mx include:_spf.google.com include:getresponse.com ~all When I run this for a test: https://...
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1answer
53 views

postfix: Cannot assign requested address

I have app that uses postfix. When i send an email from one user to another, works well, as you can see here Sep 28 14:34:04 webcat-node-77f77644-vhq94 postfix/smtpd[546]: connect from localhost[...
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1answer
31 views

What is meant by '550 Relay not Permitted' when it comes to emails?

For the past few months, I have been emailing a company with no problems. They have been able to receive my emails and they have been responding. A few days ago, they dropped me an email where my ...
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iredmail - Emails go out but don't come in

I setup an iredmail server so that my website can send registration emails and all that sort of thing. Problem is, it can send mail just fine (And even inbox) but it can't receive. Port 25 is open, ...
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1answer
25 views

Transferring domain to new host, but keeping email on old host

I'm helping out a friend manage his website. Said friend has a domain, website.com, which I am transferring from his old host (OLD) to his new host (NEW), but OLD does not provide email services (or, ...
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1answer
26 views

Postfix can't send or recieve emails

I have setup PostFix that is also running with dovecot on my server. My server is running Ubuntu 16.04. I cannot send or receive emails from squirrelmail that is also running on my server and it ...
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50 views

Error: too many hops from inbound mail server

I am working to trouble shoot an issue with our mail server; specifically when emails are sent to group. Here is the specific message I am getting: This is the mail system at host mx.example.org. I'...
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15 views

Cron sends mail to the wrong domain name

I set up a mail server with iRedMail. I am getting a lot of "unsent mail returned to sender" mail from my server. My server knows itself to be "server.example.com", but only handles mail for "example....
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1answer
37 views

Does email from IIS SMTP get rejected?

A client has been using IIS v6 SMTP over Windows 2008 R2 for many years to send out automated server notifications. Their apps use Blat to send through localhost with no authentication. Email seems to ...
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2answers
41 views

Shouldn't Gmail fail this message using DMARC due to bad alignment?

I had a test run against our mail server to see if the From header could be spoofed, which I expected to fail. We have SPF, DKIM, and DMARC all set up correctly, as far as I can tell. However, the ...
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1answer
12 views

Server migration - how to debug undelivered emails from a single sender

We're recently migrated to a new server, and I've just noticed that we're no longer receiving emails from one particular sender. All other emails are being delivered ok. It's been 60 hours since ...
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1answer
12 views

EHLO returns nothing with postfix initialized working on port 25

So I reinstalled postfix several times because of different issues. Turns out it starts well and seems to be working on port 25: I make netstat -nltp | grep 25 tcp 0 0 127.0.0.1:25 ...
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63 views

Outlook 365 1808 - Autodiscover with Postfix/Dovecot

The situation is : I have a mail server with Postfix, Dovecot and Apache2 for the autodiscover URL. Mail server is set up for TLS only (465, 993 and 995) the domain is controlled by myself (SRV ...
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1answer
25 views

Are there special aliases that a mail provider would not want normal users to obtain

Lets say, I would like to register a custom domain for email sending/receiving at Amazon AWS for a bunch of trusted users that can choose to send/receive mail with any valid mail address. Are there ...
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1answer
31 views

Mail is appearing on old server on occasion despite being set up 5 months ago

I moved a domain 5 months ago, and do not have access to the old mail server. A and MX records are all pointing to the new server. Most of the mail has started coming to the new accounts, however ...
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2answers
108 views

iDRAC 9 Enterprise SMTP alerts w/Office 365

I'm running a Dell PowerEdge T440 with iDRAC9 Enterprise. I'm attempting to setup SMTP alerts using Office 365. I have been unable to successfully send a test e-mail at all. I receive the error: ...
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1answer
75 views

Web-generated emails not compliant with DMARC

We have a classified ads website. Buyers can contact sellers. The message is directly generated on the site (php7) and sent to the user by email. If we follow the recommandations from openspf, we ...
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1answer
44 views

OpenSMTPd: Block sender based on “Received” domain

For OpenSMTPd, I would like to block a server from sending me mail based on the domain name of that server. It has a large number of IP addresses all over the place and blocking each individual one is ...
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10 views

Append or prepend custom headers during final mail delivery?

In my current dovecot setup, incoming mails are classified by rules with growing complexity. As configuration mistakes are to be expected, storing information about filtering decisions in mail headers ...
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1answer
20 views

Can I update my zonefile's MX record to use an SES endpoint without disturbing my EC2 instance's ability to send mail?

I have a zonefile with an MX record and an A record that both point to the same server. This server receives orders and then sends e-mail using sendmail to a pre-configured e-mail address. I want to ...
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1answer
39 views

Set up a smtp (mail) delivery server

this question could probably be simple but frankly I don't know exactly what it is. This is my scenario: I have multiple devices like: UPS, router, switch,... and they all have option for me to ...
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1answer
31 views

Fixing a server that has been listed an Email Spam [duplicate]

Full Disclosure: Setup of email servers is something fairly new to me, so go easy on me :) Recently users reported that they were not receiving emails from my site. The site runs a vbulletin forum so ...
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1answer
21 views

distinct mail and web hosting servers with multiple domains; spam-avoidance, PTR and SPF records

Context. I have multiple domains web services being hosted on a Digital Ocean droplet (Ubuntu and Nginx in stack). Apparently, DO automatically sets up a PTR record. However, when I query host <...
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2answers
151 views

Webmail via imap unix socket - good idea or not?

I'm slowly setting up an email system on a Centos 7 server. The particular software I'm using will consist of postfix, dovecot and roundcube, although my question isn't specific to them (I think). I'...
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0answers
24 views

Amazon Simple Email Service SES - View pending outbound emails

I am using SES to send emails via Java. I had a bug in the code that has inadvertently sent thousands of emails (I'm not quite sure how many). The application has been stopped, however the emails ...
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1answer
51 views

Postifx Dovecot lmtp, sieve not working

My mail server has a problem. I want to install sieve, but the rules do not work. As far as I found out, I think the handover at lmtp to dovecot does not work. e-mails can be received and sent, but ...
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0answers
16 views

PHPLIST latest version 3.3.3 Ubuntu Forward Link Not Working

PHPLIST latest version 3.3.3 Ubuntu Forward Link Not Working when sending campaign as admin user. Other Links working but only Forward link not working.Please see the screenshotand help me out. ...
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0answers
10 views

Postfix sender_dependent_default_transport_maps not behaving as expected

I'm trying to setup a relay host that has 2 rules: If the sender is @example.com, send via the host. If the sender is any other domain, send via a different relay. In my main.cf, I defined: ...
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1answer
86 views

Email server with no smtp connection

Ubuntu 18.04 on Google Compute Dovecot + postfix I figure I should be able to connect to a port other than 465/587, and since I can relay all email through google there should be no issue with this ...
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1answer
77 views

SMTP credentials for one server on another server - how does it work?

I have two VPS on DigitalOcean: example.com for my web page and mail.example.com as an email server. On mail.example.com I can successfully send and receive emails using terminal or a Roundcube web ...
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1answer
50 views

Unmodified SPF record, but validation results vary

I manage a small web server and have had some issues getting SPF/DMARC setup correctly for the domain. I'm trying to figure out why SPF validation sometimes passes and sometimes fails. This occurs ...
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1answer
133 views

Postfix 2.6.6 with TLS - unable to receive emails from GMail (and a couple of other MTAs) but others are OK, why?

I've just had to look at a CentOS 6 server running Postfix 2.6.6 which was able to send emails to everyone, but could not receive them from GMail (and a few other MTAs) due to incoming TLS negotiation ...
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28 views

setup Postfix gateway problems

I want to setup a PostFix mail server using gateway. I want two features. First, Mail send. MailClient ----> MyMailServer(10.0.0.2) ----> MyGateway(10.0.0.1) -----> Internet: Other MX Server ...
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32 views

Send a message using an address from a different domain

Assume that I use GSuite to handle emails for my domain (e.g., admin@my.com). Now I have a client who wants my application to send an email message with the FROM address using their domain (e.g., info@...
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87 views

Avoiding E-Mail spam filters (possibly based on originating computer?)

We recently started to send out a higher amount of E-Mails (invitations to a private event) to a select number of people. Now from some of those people using office365 for Mails, we were informed that ...