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Why Firebase Email Verification not working - Android Studio [duplicate]

I am new to firebase and I am trying to handle firebase user authentication in React.js. I did manage to create users with email and passwords. But, now I would like to send the user an Email link to reset their password.
My code currently look like this.
// This line of code belongs to the top
import { auth } from '../firebaseConfig'
//This part goes under the React component
<p onClick={async () => {
try{
await sendPasswordResetEmail(auth, // My Email Id)
alert('Password reset link has been sent to your email')
}
catch(err){
alert(err)
}
}}
>Forgot your Password ?</p>
However, I do not get any error messages and I do get the alert message that says "Password reset link has been sent to your email." Unfortunately, I didn't receive any email. Note that I have given my own email id as the parameter for testing purposes.

firebaser here
Did you check your spam folder? We recently see a lot of the emails from Firebase Authentication ending up in the user's spam folder or being marked as spam in a system along the way. This is being tracked in this status message on the Firebase dashboard and in public issue #253291461.
To reduce the chances of the messages getting marked as spam, consider taking more control of the email delivery yourself.
As a first step, consider using a custom domain with your project. Email that comes from a custom domain has less chance of being marked as span.
As a second step, consider setting up your own SMTP server.) for delivering the email, so that the emails are not being delivered from Firebase's shared infrastructure anymore.
While these steps are more involved, they typically will drastically reduce the cases where the messages from Firebase Authentication are marked as spam.

Full Guide Based on Frank's Answer
Firstly create a new email account you can use to relay the Firebase emails through the SMTP server with. I personally chose Gmail, but I tested with Outlook and it also works.
You can now find an SMTP server host that will work for your scenario. If you're sending less than 1000 emails per month you can find free and reliable hosts. I chose SMTP2GO's free option.
Now you've found the SMTP host, add the email address you've chosen as a single sender email (note that if you do own a domain, you can alternatively use that to send emails).
Note that you will have to verify the email, usually by your host sending a link to the email's inbox. Make sure to check spam.
Once verified, navigate to where you host allows you to add SMTP Users and add a new user. This will allocate an SMTP username and password.
Navigate to the Firebase console, and choose the Authentication option from the sidebar (within the Build product category).
Go to Templates → SMTP Settings and enter the details of your SMTP server. The username and password fields are to be filled with the SMTP user login you created in the step above.
It is better to use TLS, but I believe SSL should work too but it is untested.
Click save, and you're all set up - but there may still be steps to perform depending on your email provider.
Provider Specific Steps
If the emails are being sent to an account managed by Google you will have no issues with your emails being quarantined by anti-spam policies and it will work immediately.
If you are using Outlook, you will have a different problem on your hands. Outlook's built in defender will most likely have auto-quarantined your email under multiple policies - that bit is important.
These policies are likely to be both spam and phish policies. If you unblock one of them, the other will catch it and re-quarantine.
Unblock both policies for the email address, and test. You can see the status of quarantined messages in Microsoft 365 Defender app under Review → Quarantine. Please note that you will need to be an administrator to add global allow policies to your email accounts.
If this still doesn't work it is likely that your company has an additional external filter (as mine did), and you will have to add the IP's manually to the Tenant Allow/Block Lists spoofed senders tab.

how send email from android application directly?

I want the email to be sent immediately, currently the application is showing me installed email applications in device where I can recompose the email before sending, I want to send the mail directly without showing installed applications.
I Know javamail but need email .. other user can decompiler app and theft email :)

The way to go is to send the mail via some server, not directly from the device. You would, for example, connect to a REST API that sends out the email for you. Sending an email directly from the device from the user's email address is not (and should not be) possible

There are two ways to send email from android application directly without any intent
using SMTP & JavaMail API follow the link for details
using Webservice( for example PHP script ) so there is a server side code and you hit that URL with param like ( name,subject etc) so basically PHP code send mail at the end and it's very easy to use .
Personally, I suggest you use Webservice because it's simpler than first approach.
** Edit: You can save email in sharedpreferences or database and fetch it from there when you try to send mail rather than hardcoding it to avoid theft email risk.(directly putting mail address inside code)
Anyway you can prevent other from getting your full source code.See this answer

Send mail (Java vs Php)

I have developed an app with a login. To help users I would like to send a mail reminding their credentials.. 2 solutions but 2 problems:
1) If I send the mail from the mobile phone (using my gmail account and mail.jar library) Google always reports a possible violation of my account or a suspect access, blocking it. I read several forum page about remove this feature but some people say that Gmail is built to be used by a single person
2) If I send a mail from a php page (using the function mail($mailto,$subject,$message,$header) several mail server put automatically this email into the trash folder.
Any suggestion? How to solve this issue?
Thank you in advance

You could send mail in java (mail.jar or mailServices of Spring Framework). I suggest you to use a mail provider service to send mail. It's better because there many things to care with when you send email ( email does not exist, delay of receiving the email, the current status of email sent, received or read...)

send mail using java api

i have requirement that i need to send/receive email after successful login by user, upon click on email verification i will activate the user . i dont have dedicated smtp server for send/receive mails for this requirement. right now i am looking for free service for initial start up options , i gone through this http://www.mkyong.com/java/javamail-api-sending-email-via-gmail-smtp-example/ for sending email through gmail. my question is can i receive mail using gmail smtp service?

Short answer: No, not with SMTP. But probably with IMAP/POP.
Long answer: SMTP is only used for sending email between MTAs (Mail Transfer Agent). You'll have to download the email from your email provider, google in this case, using IMAP or POP.
You'll have to connect and check regularly as without an MTA service on your end, you can't get email pushed to you. Most personal ISPs block outbound port 25 so setting up a MTA might be tricky as you have to figure out your providers SMTP relay (if they even have one!)
See here for enabling IMAP/POP support for gmail:
https://support.google.com/mail/troubleshooter/1668960?hl=en
Google will find you a suitable imap/pop client library to use with java.
Edit:
If you are doing a regular e-mail verification step for a website registration, you don't need to receive an e-mail from the user. You send them an e-mail with a a link to your websites verification URL. The link contains a predetermined ID, say the sha1 sum of username + e-mail encoded into the URL. The user clicks the link and opens a specific page on your site where you verify the ID when the page is loaded. This is how it is usually done. This way you don't need to receive any email programmatically.
Unless receiving it by email is a specific requirement from your customer, in which case you can ignore this edit. :)

Best way to send an E-Mail from a java Application

I've been searching for the best way to send an e-mail with an attachment by my java application. I want to use this as an users bug report with logger files. The recipient should be my own e-mail address. I'd prefer the use of an e-mail client.
I tried the following:
Send an e-mail with user authentification like this. I don't want to use this, because the user would need to reveal his e-mail account and password. Furthermore, I'd have to set the properties for every e-mail adress, which is impossible.
Send an e-mail directly to my own e-mail address like this in Listing 16.16 (didnt found an english example). The problem is every e-mail server is using POP authentification nowadays, that means the recipient e-mail server won't accept my e-mail.
Using the mailto URL syntax like this. Doesn't work aswell, because the attachment function isn't working properly in every e-mail client. Best solution so far is to brief the user to add the attachment by himself, after I would put it to his desktop. Or upload the data and add a link to the e-mail body.
The last way I've found is this one. As you could assume this won't work either, because the localhost needs to be connected to the internet and capable enough to send an e-mail.
Hopefully I explained my problem well enough. Is there a different way to send bug reports?

The generally accepted way to get around the problems you describe is to keep all the email logic server side, and then have your application call a web service with the appropriate parameters. It's pretty easy to knock a PHP script / servlet up that will do the job and then send the results on via email, put them in a mysql database or so on.
However, if you can't / don't want to / won't keep this server side, I'd recommend using JavaMail to create a MimeMessage, then using writeTo() to write this to an EML file.
You can then do the usual:
Desktop.getDesktop().open(emlFile);
...which will open the EML file with the default application for handing those files, which is almost always the mail client. Still not foolproof, but if you're determined on sending the email from the client directly I think that's as good as you'll get.