[Linux][mutt]How to improve email "trustworthyness" - linux

So, I run an online service where people can sign up using their email address. It's as basic as it can get. Put in your address, receive email with confirmation link.
For that I've set up mutt on Debian 11 which I'm using to send a HTML-EMail with an attachment.
For some reason, mail providers like googlemail and outlook filter those mails out. Sometimes they appear in peoples inbox, sometimes in spam and sometimes they don't get them at all. My googlemail UI shows me that it "couldn't verifiy if this email came from DOMAIN or from a spammer".
Does anyone here know what I can do to resolve this problem?
Any advice is appreciated.

Related

Email phishing detection issue on GoDaddy / mailgun can it be connected with DMARC?

Some email clients consider our emails as a phishing (in Office 365). The only thing that was missing based on the https://mxtoolbox.com/SuperTool.aspx?action=mx was DMARC entry missing.
I've added TXT DNS record like this (TTL 1hr):
v=DMARC1;p=none;pct=100;rua=mailto:postmaster#mydomain.com
Can it resolve the issue? Is there any specific action required to make it work with Mailgun / GoDaddy?
Thanks in advance for any help/info.
Since you have p=none, it won't resolve the issue, you need to inform the mail server to reject the email. Basically, you're just in monitoring mode with p=none.
What that being said, it sounds like you're saying Office 365 is regarding your emails as a phishing attempt. I think you might be hitting their spam filter based on certain keywords. Send an email to yourself and look at the PCL in the email headers in the outlook account and see what it says.
If you don't know how to see view the headers and just want to make it easy, you can use an inbox tester that will show you the headers.
You can also open a ticket with Microsoft and ask them why the PCL is high on your emails. They might be able to assist.
Link to: Microsoft Sender Support
Another good thing to do is to go through this Email Checker Guide, it touches on every aspect of sending email. You might have a mis-configuration someplace that's causing the issue.

Nodejs receiving email and redirecting to gmail email address

So i have an website, abc.com. If someone sends an email at support#abc.com i want to receive it at gmail address or whatever address i chose. Then if i reply to that email it in gmail then it should send either using gmail or mandrill. And from of the email should show up as support#abc.com.
This is my first time tackling email. And i have no clue.
So far i understand i need something to take emails in, send emails out, and then there is smtp server.
I get that nodemailer fulfils the role needed by two of the first things..But rest is confusing.
I know this sounds vague but as front end jquery dev i never thought of this much. So be patient and understand like with http protocol i have not much of understanding on this. This question could be many questions however i don't know what those question need to be.

Unable to send to unresolved email addresses although configured in settings

I want to send an email in a workflow from a hard coded email address and I have made sure that the option is set to allow this in system settings but I still cant get it work.
Have I missed another setting? Or does this option only allow unresolved emails in the "To" field?
I shouldnt have thought that would work from a hardcoded email address.
Crm doesnt send emails itself, it either uses the users outlook, or uses email router - both of which requrie a system user record.
In the case of the outlook it is really sent by the user, in the case of the email router it is generally sent from exchange.
Crm cant just pretend to be an email address.
The CRM usually takes 10-12 hours to send email to un-resolved email addresses after the setting has been turned on.
Maybe waiting helps

cpanel sent emails marked as spam

my site use latest version of cpanel
but when i send email via cpanel email account to gmail,the gmail marked it as spam
where is the problem?
This can occur for many causes,
The first thing that causes many email services mark a message as SPAM is your IP address, maybe your IP address is listed as SPAM generator - But I think it's not very important for GMail.
You should set your Reverse DNS record because It's important too.
Maybe you're sending email with bad protocol parameters - I think cpanel does It good, I'm not a cpanel experienced.
Removing SPAM mark from emails helps to GMail removes the sender from blacklists.
Google has very good documents about how to send emails to GMail to not marking as SPAM.
you can check if your mail server is not listed in spam databases.
Here is one: http://www.spamhaus.org/query/bl?ip=173.194.32.21
When i opened spam message in gmail, then she said why it is in spam ...

How to prevent emails from a specific address going to Hotmail SPAM?

I have a site on a dedicated server with it's own IP range that has been running for a good few years. We have a notification email address (mailout#domain.com) which we use to send automated emails (activation emails when a user signs up and notification emails if something relevant to them happens, eg someone befriends them or comments on their picture etc). Users can select whether to receive these notifications or not. We have SPF and RDNS setup.
Email from all our other email accounts go to hotmail/gmail/yahoo mail etc correctly into the inbox. However any mail sent from the mailout#domain.com account (whether automatically by the server or manually via outlook) is delivered correctly to the inboxes for yahoo and gmail however goes into Junk in Hotmail (but other #domain.com addresses deliver to hotmail's inbox correctly). It says at the top of the message that MS Smartscreen marked this message as junk. I signed up for MS Smart Network Data Services to monitor the IP and it says it's not blocked but it displays Bot-like behaviour (which kind of makes sense as our notifications are kind of bot like even though they're not spam).
I can't work out what to do to prevent this from happening, we've authenticated the email, there's obviously not a general block on the IP as emails from different accounts on the same domain are going through successfully. It doesn't seem to be the format of the email either because if I send identical emails from mailout#domain.com and contact#domain then the one from contact# gets through to the inbox but the one from mailout# goes through to junk.
I can't really work out what to do and obviously trying to get MS to sort it out is never going to happen and i've used all their available tools. I can obviously try setting up a new email address (eg noreply#domain.com) and using that for notifications but i assume it will only be a matter of time before that gets blocked as well.
I would be immensely grateful for any suggestions anyone has!
Thanks so much,
Dave
You don't have many options. Try to do as many of the following as you can:
Reach out to MS support (don't discard this notion)
Implement DKIM and possibly DMARC (which are vastly more informative than SPF)
Change your IP address to something cleaner
Find and follow bulk sender best practices, e.g. M³AAWG's BCPs, perhaps the Help – I'm on a Blocklist doc

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