Spam Test Result

From : nobox <[email protected]>
Bounce address : bounce+8493c3.bfa01-noboxsolutions-ZBTF=srv1.mail-tester.com@mg1.nobox.se

Hello!

Skickat med Post SMTP 3.9.1 - https://wordpress.org/plugins/post-smtp/

DMARC-Filter: OpenDMARC Filter v1.4.2 mail-tester.com A0F35FC60D
Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=141.193.32.16; helo=v516.v5ed9ac7d.euw1.send.eu.mailgun.net; envelope-from=bounce+8493c3.bfa01-noboxsolutions-zbtf=srv1.mail-tester.com@mg1.nobox.se; receiver=<UNKNOWN> 
Date: Wed, 29 Apr 2026 13:14:15 +0000
Mime-Version: 1.0
Content-Type: multipart/alternative;
 boundary="16b83c7f8d63f9caa356dfdfcd7389c23c4fc606a2f9606e48a66654a69c"
Subject: Post SMTP test (nobox.se)
From: nobox <[email protected]>
To: [email protected]
Mime-Version: 1.0
Message-Id: <[email protected]>
Sender: [email protected]

--16b83c7f8d63f9caa356dfdfcd7389c23c4fc606a2f9606e48a66654a69c
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset=ascii

Hello!

Skickat med Post SMTP 3.9.1 - https://wordpress.org/plugins/post-smtp/


--16b83c7f8d63f9caa356dfdfcd7389c23c4fc606a2f9606e48a66654a69c
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset="utf-8"

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.=
w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns=3D"http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8" />
</head>
<body class=3D"wporg-notification">
	<div style=3D"style=3D" width: 600px; margin: 0 auto;">
		<link href=3D"https://fonts.googleapis.com/css2?family=3DPoppins:ital,wgh=
t@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1=
,400;1,500;1,600;1,700;1,800;1,900&display=3Dswap" rel=3D"stylesheet">		<ta=
ble style=3D"width: 600px;margin:50px auto;color:#7D98B2;font-size:12px;pad=
ding:30px 0;">        <thead>            <tr>                <th>          =
          <a href=3D"https://postmansmtp.com/"><img style=3D"width: 160px;"=
 src=3D"https://nobox.se/app/plugins/post-smtp/assets//images/logos/postman=
-logo-email.png"/></a>                </th>            </tr>               =
    </thead>        <tbody>             <tr>                <td style=3D"pa=
dding: 0 20px;">Hey there =F0=9F=91=8B,</td>            </tr>            <t=
r>               <td style=3D"padding: 0 20px;"><h3 style=3D"color:#214A72;=
font-size:16px;font-weight:600;display: inline-block;margin:0; font-size: 2=
0px;">Congrats! Your test email was sent successfully</h3></td>            =
</tr>            <tr>                <td style=3D"padding:0 20px;line-heigh=
t: 20px;">Thank you for using Post SMTP. Our mission is to enhance you emai=
l deliverability.</td>            </tr>            <tr>                <td>=
					<a href=3D"https://postmansmtp.com/post-smtp-mobile-app/" target=3D"_b=
lank">						<img style=3D" margin: 20px 0; width:100%" src=3D"https://nobox=
=2Ese/app/plugins/post-smtp/assets//ima=
ges/logos/post-man-banner.png"/>					<=
/a>				</td>            </tr>            <tr>                <td style=3D"p=
adding:0 20px;font-size: 12px;text-align: center;">                    This=
 email was sent from your website <a href=3D"https://nobox.se" target=3D"_b=
lank"><strong>nobox</strong></a> to test your email functionality.         =
       </td>            </tr>        </tbod
</body>
</html>
--16b83c7f8d63f9caa356dfdfcd7389c23c4fc606a2f9606e48a66654a69c--

The famous spam filter SpamAssassin. Score: -1.6.
A score below -5 is considered spam.

-0.1	`DKIM_INVALID`	DKIM or DK signature exists, but is not valid
-0.1	`DKIM_SIGNED`	Message has a DKIM or DK signature, not necessarily valid This rule is automatically applied if your email contains a DKIM signature but other positive rules will also be added if your DKIM signature is valid. See immediately below.
-1.282	`HTML_IMAGE_ONLY_24`	HTML: images with 2000-2400 bytes of words You should write more text in your email
-0.001	`HTML_MESSAGE`	HTML included in message No worry, that's expected if you send HTML emails
-0.1	`HTML_TAG_BALANCE_BODY`	HTML has unbalanced "body" tags
-0.001	`SPF_HELO_NONE`	SPF: HELO does not publish an SPF Record
0.001	`SPF_PASS`	SPF: sender matches SPF record Great! Your SPF is valid
-0.01	`T_REMOTE_IMAGE`	Message contains an external image

We check if the server you are sending from is authenticated

Sender Policy Framework (SPF) is an email validation system designed to prevent email spam by detecting email spoofing, a common vulnerability, by verifying sender IP addresses.

What we retained as your current SPF record is:

v=spf1 include:eu.mailgun.org ~all

Verification details:

dig +short TXT mg1.nobox.se :"v=spf1 include:eu.mailgun.org ~all"
dig +short +time=3 +tries=1 TXT @ns3.digitalocean.com. mg1.nobox.se :"v=spf1 include:eu.mailgun.org ~all"
spfquery --scope mfrom --id bounce+8493c3.bfa01-noboxsolutions-ZBTF=srv1.mail-tester.com@mg1.nobox.se --ip 141.193.32.16 --helo-id v516.v5ed9ac7d.euw1.send.eu.mailgun.net :pass
mg1.nobox.se: Sender is authorized to use 'bounce+8493c3.bfa01-noboxsolutions-ZBTF=srv1.mail-tester.com@mg1.nobox.se' in 'mfrom' identity (mechanism 'include:eu.mailgun.org' matched)
mg1.nobox.se: Sender is authorized to use 'bounce+8493c3.bfa01-noboxsolutions-ZBTF=srv1.mail-tester.com@mg1.nobox.se' in 'mfrom' identity (mechanism 'include:eu.mailgun.org' matched)
Received-SPF: pass (mg1.nobox.se: Sender is authorized to use 'bounce+8493c3.bfa01-noboxsolutions-ZBTF=srv1.mail-tester.com@mg1.nobox.se' in 'mfrom' identity (mechanism 'include:eu.mailgun.org' matched)) receiver=mail-tester.com; identity=mailfrom; envelope-from="bounce+8493c3.bfa01-noboxsolutions-ZBTF=srv1.mail-tester.com@mg1.nobox.se"; helo=v516.v5ed9ac7d.euw1.send.eu.mailgun.net; client-ip=141.193.32.16

DomainKeys Identified Mail (DKIM) is a method for associating a domain name to an email message, thereby allowing a person, role, or organization to claim some responsibility for the message.

The DKIM signature of your message is:

	a=rsa-sha256;
	v=1;
	c=relaxed/relaxed;
	d=mg1.nobox.se;
	q=dns/txt;
	s=s1;
	t=1777468455;
	x=1777475655;
	h=Sender:Sender:Message-Id:Mime-Version:To:To:From:From:Subject:Subject:Content-Type:Mime-Version:Date;
	bh=hbxua5cKgUMMDsp/XRmtCjlDpQsH+ahRobEk+rMOGKQ=;
	b=d0LOJr/4bi/TlWP9HegRQIgdfwUAIU+MMDs4zeTWryA9amFgEHcPpjsbvf39fmQqRuLu/IwxToiF1lkfnaHFbjLpPp0qBIjlyM4QVntF1ZimTdrICE74dLeScmQHrB0qXMn42wkeO821WuzAuoz5qw4VGPpNpXqGhAtTWKuEMps=

Your public key is:

"k=rsa;
p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCxtrRRcBUlAm+N8PPC47h4f+r7Pgd6BE+X4TURZfOPhpHmdtL4F8SmIeI5FAdnvZeUiNe/Zob02Ef7w0fP8WbxbapB9GTvec4xk1D23LoqTlHDH5cLyzCAyyihbsYj3Rq4jEUQo1t4A3TJX4CC3AqhP1gIghAVCKKsReWafH8E5QIDAQAB"

Key length: 1024bits

Your DKIM signature is not valid

A DMARC policy allows a sender to indicate that their emails are protected by SPF and/or DKIM, and give instruction if neither of those authentication methods passes. Please be sure you have a DKIM and SPF set before using DMARC.

You are not allowed to send a message with this address

DMARC DNS entry found for the domain _dmarc.nobox.se:

"v=DMARC1; p=quarantine;"

Verification details:

mail-tester.com; dmarc=fail (p=quarantine dis=none) header.from=nobox.se
dkim.mail-tester.com; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=mg1.nobox.se [email protected] header.a=rsa-sha256 header.s=s1 header.b=d0LOJr/4; dkim-atps=neutral
From Domain: nobox.se
DKIM Domain: mg1.nobox.se

Reverse DNS lookup or reverse DNS resolution (rDNS) is the determination of a domain name that is associated with a given IP address.
Some companies such as AOL will reject any message sent from a server without rDNS, so you must ensure that you have one.
You cannot associate more than one domain name with a single IP address.

Here are the tested values for this check:
IP: 141.193.32.16
HELO: v516.v5ed9ac7d.euw1.send.eu.mailgun.net
rDNS: v516.v5ed9ac7d.euw1.send.eu.mailgun.net

We check if there is a mail server (MX Record) behind your domain name mg1.nobox.se.

MX records (mg1.nobox.se) : 10 mxb.eu.mailgun.org.
10 mxa.eu.mailgun.org.

We check if there is a server (A Record) behind your hostname v516.v5ed9ac7d.euw1.send.eu.mailgun.net.

A records (v516.v5ed9ac7d.euw1.send.eu.mailgun.net) : 141.193.32.16

Checks whether your message is well formatted or not.

Weight of the HTML version of your message: 2KB.

Your message contains 1% of text.

ALT attributes provide a textual alternative to your images.
It is a useful fallback for people who are blind or visually impaired and for cases where your images cannot be displayed.

<img style="width: 160px;" src="https://nobox.se/app/plugins/post-smtp/assets//images/logos/postman-logo-email.png"/>
<img style=" margin: 20px 0; width:100%" src="https://nobox.se/app/plugins/post-smtp/assets//images/logos/post-man-banner.png"/>

If you don't want to add an alt attribute, add an empty one: alt=""

Checks whether your message contains dangerous html elements such as javascript, iframes, embed content or applet.

Checks whether your message uses URL shortener systems.

The List-Unsubscribe header is required if you send mass emails, it enables the user to easily unsubscribe from your mailing list.

Your message does not contain a List-Unsubscribe header

Matches your server IP address (141.193.32.16) against 23 of the most common IPv4 blocklists.

Not listed in Spamhaus SBL Advisory

Not listed in Spamhaus CSS Advisory

Not listed in Spamhaus XBL Advisory

Not listed in Spamhaus PBL Advisory

Not listed in Barracuda

Not listed in Hostkarma

Not listed in IMP-SPAM

Not listed in BACKSCATTERER

Not listed in China Anti-Spam Alliance

Not listed in LashBack

Not listed in mailspike

Not listed in REDHAWK

Not listed in SORBS (Relay)

Not listed in SORBS (last 48 hours)

Not listed in SORBS (last 28 days)

Not listed in SPAMCOP

Not listed in SEM-BACKSCATTER

Not listed in SEM-BLACK

Not listed in RATS-ALL

Not listed in PSBL

Not listed in SWINOG

Not listed in GBUdb Truncate

Not listed in Weighted Private Block List

Checks if your newsletter contains broken links.

[200 - Success : OK] https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap
[200 - Success : OK] https://postmansmtp.com/
[200 - Success : OK] https://nobox.se/app/plugins/post-smtp/assets//images/logos/postman-logo-email.png
[200 - Success : OK] https://postmansmtp.com/post-smtp-mobile-app/
[200 - Success : OK] https://nobox.se/app/plugins/post-smtp/assets//images/logos/post-man-banner.png
[200 - Success : OK] https://nobox.se

Your email may never see the light of an inbox

Click here to view your message

HTML version

HTML version (without external images)

Text version

Source

SpamAssassin thinks you can improve

Your DKIM signature is not valid

[SPF] Your server 141.193.32.16 is authorized to use bounce+8493c3.bfa01-noboxsolutions-ZBTF=srv1.mail-tester.com@mg1.nobox.se

Your DKIM signature is not valid

Your message failed the DMARC verification

Your server 141.193.32.16 is successfully associated with v516.v5ed9ac7d.euw1.send.eu.mailgun.net

Your domain name mg1.nobox.se is assigned to a mail server.

Your hostname v516.v5ed9ac7d.euw1.send.eu.mailgun.net is assigned to a server.

The body of your message contains errors

We found 2 images without alt attribute in your message body

Your content is safe

We didn't find short URLs

Your message does not contain a List-Unsubscribe header

You're not blocklisted

No broken links