I am getting ErrorNonExistentMailbox error when sending a draft email from user's account. Its happening to a single user.
{"error":{"code":"ErrorNonExistentMailbox","message":"The SMTP address has no mailbox associated with it."}}
What can be the reason behind this?
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I have built an app that uses email & password authentication from Firebase, to enable users to log in, as per the Firebase documentation. The app itself uses Flutter as the coding language. I also have email verification enabled, to prevent spam accounts.
When a user adds their email address and password and clicks 'submit', they're given a notification telling them to check their emails for the verification link, which they must do before being allowed to log in.
The problem I am having is that users do not receive the verification email, so cannot log in. I've come across similar questions on this forum, where the answers have centred around checking spam/junk folders. I have asked the users to do this but they still have not received the email.
I've also tried using my own SMTP server, which is one from which I know I can send emails. Even with this, the users do not receive their verification email. This makes me think the emails aren't being generated/sent, as opposed to them being sent and not being received.
Can anyone suggest why this might be the case? Why is it that users are not receiving the verification email and what can I do to correct this?
If you don't use custom domain, sometimes emails go in spam folder
I am using Firebase Authentication in my Ionic App. Some users have reported to not receive the verification email which is sent after a user signs up, or when the resendVerificationEmail is triggered.
This works fine for email providers like #gmail.com or #live.de, but for those other users with special providers like #gmx.at it's not working. The emails are sent successfully according to firebase but they are never received.
Possibly the emails get filtered?
Has anyone else ran into this problem? The message template can not be modified but would using a custom SMTP server possibly help?
The problem is solved by using my own private SMTP server for sending the Authentication emails.
I am using a hosting service for my domain that comes with email service so I am using that one. Using other services such as Mailgun or Mailjet etc. might also solve the problem.
You can set up your custom SMTP server right in the firebase console under Authentication/Templates.
I had the same problem with others emails providers (orange.fr sfr.fr free.fr ...). After deeper analysis, it appeared that it is the domain address inside the (generated) link that is detected as SPAM by emails providers (maybe everything that sounds like *.firebaseapp.com)
https://your-subdomain.firebaseapp.com/__/auth/action...
I changed it to a custom one of mine (through Authentication->templates->"Customize action URL" (bottom right)):
https://www.my-custom-domain.com/__/auth/action
and no more problem!
Some doc (note on blue background):
https://firebase.google.com/docs/auth/custom-email-handler?hl=en&authuser=0#link_to_your_custom_handler_in_your_email_templates
I've recently found out that, if Evernote's user does not verify his email address, all requests to Evernote API is not working. But I didn't find any ways to request email verification in Evernote's web interface, looks like the proposal to verify email appears randomly ? Are there any ways to request email verification from the user ?
You can ask users to change their email address via the page on the web, which will send them a verification email and verify their address.
Email is sent using Amazon simple Email service form my website. When an email is sent to any Yahoo or Gmail address, it is delivered to Inbox; but when it is sent to Hotmail,it is delivered to Junk.
Why only Hotmail Treats my email as junk?
When an external user sends email messages to an Outlook.com account,
SmartScreen® filter technology evaluates the content of the messages
and assigns each message a rating based on the probability that it is
a junk email. This rating is stored as a message property called a
spam confidence level (SCL) within the message itself. The SCL rating
stays with the message as it is sent to other anti-spam protection
layers within Outlook.com. Rules inside Outlook.com are set to handle
email messages with various SCL ratings. If a message has an SCL
rating lower than a certain threshold, it is considered to be spam,
and a rule then deletes the message rather than sending it to the
user's junk email folder. If the message has a higher SCL rating than
the threshold, the email is delivered to the user's junk email folder
rather than to the inbox.
https://mail.live.com/mail/junkemail.aspx
Not all the Anti-Spam system depends only on 3rd party blacklists. Major email service providers builds their own reputation table in addition with the use of major 3rd party blacklists like spamhaus, barracuda etc. In your case, you are using Amazon SES to send mails.
I, myself found enormous marketing mails coming from Amazon SES. If the reputation of your email service provider is bad in hotmail then it may trigger the suspicious level of your mail regardless of your email service provider reputation at other blacklist providers. In addition to this, if your subject, body content contains some suspicious words then your mail will end up in junk folder.
Most emails sent from third party applications such as Wordpress, Joomla, or Amazon get diverted to junk and sometimes they fail and get stuck behind a security layer. I know for a fact with Wordpress Contact Form 7, this is the case many times.
After so many years and finally attending a seminar for this particular issue, I finally was able to solve this problem specifically for Hotmail (Outlook.com).
Before you do anything ensure your SMTP settings in your web config file (ASP.NET) are written correctly or in case of plugins (Wordpress) make sure the fields are filled correctly. This means ensuring these are the settings you are using for Outlook:
From: your email ("asdf#outlook.com")
From Name: "Your name or company name"
Host: smtp.live.com
Type of Encryption: TLS
SMTP Port: 587
SMTP Authentication: Yes
Username: Same you use to login (usually the complete email address)
Password: Enough said there
IMPORTANT - Send a test email even if it fails. The point is to trigger an activity in Outlook and have them flag it as an
unauthorized connection
Now, to the fix:
Go to Outlook.com
Login
go to Account Settings
Choose Security & Privacy
Click on "See my recent activity"
The most recent activity should be the fail attempt. Authorize it as a trusted connection.
Done!
Re-test and you shall see your emails showing in the inbox as an authorized connection. Doing these steps let Outlook know that your emails from Amazon are legitimate connections and not Amazon trying to spam your account with solicitations etc.
Mostly it is a email service provider specific thing but you can do below checks
Ensure valid sender email address
Try not to use keywords like gift, prize etc. which are preferably spam activities
Try using https://litmus.com which may help on this/ rendering email in different email clients
I am developing a software but for that I want to know as if i send an email then how can i check the sent email is in recipient's inbox/ Junk.
I am using AsP.net and c# technology for this
Please reply
You can't detect what is done with the email once it is delivered to the users inbox other than requesting a delivery receipt and a read receipt but the user can opt out of these.
The best way to avoid being marked as spam is to use a trusted third party service such as Campaign Monitor or MailChimp.
Failing that you should make sure that your email has a proper from address set, that you have set up SPF records to allow the sending IP official permission to send email on behalf of the from domain, keep your html to content ratio reasonable and if possible use an email address that your customers have already received an email from before so that there is a higher chance that the address is already in a whitelist.
You really can't because there are many different email spam solutions out there and they don't send a status back saying whether they delivered the email to the recipient or not. What you can do is send an email with a tracker to see if the receiver opened it.
http://www.aspnetemail.com/samples/emailtracker/default.aspx