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Joined: Jun 2006
Posts: 987
Likes: 24
Old Hand
Old Hand
Joined: Jun 2006
Posts: 987
Likes: 24
I am getting more and more problems with email Delivery Host: smtp.mailchannels.net
they reject email coming from our forum.

SMTP error from remote mail server after end of data: 550 5.7.1 [CS] Message blocked. If this is a false positive, please report this to your hosting service provider.

my host wrote in a reply:
Quote
The mails may be detected as spam due to its spam contents. Each email is evaluated and rated according to spam rules to determine how likely they are to be actual spam. The mail servers will evaluate both the title and body content of the message to ensure there are few, if any, references to popular spamming terms.

Please make sure that the below points are followed:

> Don't use the word "free" too many times.
> Don't use ALL CAPS.
> Don't use lots of colored fonts.
> Only use one exclamation point at a time!
> Stay away from words you'd see in spam: Viagra, drugs, porn, guaranteed winner.

One of the most frequent forums had the word FREE in the header its now removed. member writes motorcycles brands like BSA in captions and and when they wish to sell they often use '71 for a 1971 model.

I have tried now to edit my forums to only use the first letter in ea forum header and tried to find the language files that are used for emails.
Could you advice which language files I should edit so that there are so few captions as possible in outgoing emails?

Any other advice how to act is also appreciated.
Thanks

Last edited by Morgan; 01/22/2019 3:23 AM.

Morgan Johansson
BritBike Forum
https://www.britbike.com/forums/ubbthreads.php
Joined: Jun 2006
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UBB.threads Developer
UBB.threads Developer
Joined: Jun 2006
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Likes: 116
Well, the good news is that you're not listed in any major blacklists (clicky).

I have never heard of smtp.mailchannels.net before, I'm assuming its the mail service provided by your webhost; if so, you might try a separate SMTP service such as GMail (I use GSuite on both A Gardeners Forum and UBBDev to see if they detect any issues with your content and delivery to your users.

It's important to note that a 3rd party mail server can block you for any number of reasons, including sending notices too quickly; its their service to customize as they please, and that can sometimes leave their clients having to deal with it.


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Old Hand
Old Hand
Joined: Jun 2006
Posts: 987
Likes: 24
Its not my hosts service I think its Gmails but am uncertain, all blocked emails was to gmail/bigpond receivers.
our host has now contacted mailchannels and reported a false positive to mailchannels.
I see now that emails are accepted from the forum.



Morgan Johansson
BritBike Forum
https://www.britbike.com/forums/ubbthreads.php
Joined: Dec 2003
Posts: 6,560
Likes: 78
Joined: Dec 2003
Posts: 6,560
Likes: 78
I have been through blacklistings before.
It can be more than the general blacklist.

But get down to individual servers on private networks such as corp or government email
where they subscribe to blacklist services outside of just spam but place you in what they want to block , such as sports or entertainment sites that they elect.
Good luck on correcting that.


Blue Man Group
There is no such thing as stupid questions. Just stupid answers
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I was getting forum notification email bounce messages regularly from Gmail.com. I talked to my hosting company tech and he recommended configuring SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail). This made a big difference and eliminated the rejects from Gmail.

Now when I do get a bounce for "no email account" and the like, I see in the headers that they are checking for DKIM and noting it in the headers that we are OK.

Check with your hosting company about enabling those two protection services that help to authenticate that the sender is who he says he is.

Sometime in the next few years, email and telephone sender authentication will required in order to cut down on spamming and robocall telemarketing.

Joined: Apr 2004
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UBB.threads Developer
UBB.threads Developer
Joined: Apr 2004
Posts: 1,945
Likes: 145
Good post, Digitalgas thumbsup


UBB.threads 7.7.0 now allows you to add your forum email DKIM settings right from inside the Control Panel (Primary Settings > Advanced Mail Configuration).

If you send a large volume of emails to Gmail users, you can use Google's Postmaster Tools

Google Postmaster Tools
  • If users are marking your emails as spam
  • Whether you’re following Gmail's best practices
  • Why your emails might not be delivered
  • If your emails are being sent securely

More information @ https://postmaster.google.com/

Additional reading on DomainKeys Identified Mail (DKIM) at
https://blog.returnpath.com/how-to-explain-dkim-in-plain-english-2/


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