Magento 2.3.0 Unable to send email: Unknown error

[sagarnakrani]

Hello,

I've installed fresh magento version 2.3.0 and done email configuration but all the email doesn't send that gives me error message like "Unable to send email: unknown error". Then i've installed SMTP module and configure it and all email is sending now. but Is there any other solution of without installed SMTP module ?

Thanks in advance.

[shajitha_banu]

Hi,

Here is the reason for the issue.

Deprecated Functionality: idn_to_ascii(): INTL_IDNA_VARIANT_2003 is deprecated in /vendor/zendframework/zend-validator/src/EmailAddress.php on line 560

As I analyzed, there was some deprecated function in Magento 2.3.0

That was conflicts with PHP version 7.2.

This issue can be fixed after downgrade the PHP version from 7.2 to 7.1

It may help to you. please refer the link.

https://github.com/magento-engcom/php-7.2-support/issues/12

[charles]

Hi,

Is there any other option available without degrading PHP 7.2?
I'm using Magento 2.3.1 with PHP 7.2, facing error while creating customers account at admin end. 

Log:

main.CRITICAL: Exception message: Deprecated Functionality: idn_to_ascii(): INTL_IDNA_VARIANT_2003 is deprecated in /public_html/vendor/zendframework/zend-validator/src/EmailAddress.php on line 560

idn_to_ascii() at Line 560: 

return (idn_to_ascii($email) ?: $email);

[Manish3m]

The issue is still there with Magento 2.3.3. Looks like no one bother to support  or fix issues on Magento anymore(Adobe !!!)

[Klickonweb]

I have same issue is it work in php version 5.6.40 ? let me know please . thanks in adv