I am using Magento 2.3.1 I have installed the Mageplaza Smpt module with its latest core module. When I'm testing a test mail button, this error occurs. I am using yahoo mail to send an mail.

A technical problem with the server created an error. Try again to continue what you were doing. If the problem persists, try again later.

enter image description here

  • 1
    Please provide the corresponding entry from var/log/system.log or var/log/exception.log Dec 13 '19 at 13:46
  • This is the error in system.log Deprecated Functionality: idn_to_ascii(): INTL_IDNA_VARIANT_2003 is deprecated in /home/linenord/public_html/vendor/zendframework/zend-validator/src/EmailAddress.php on line 560 Dec 13 '19 at 14:03
  • 1
    Guess you have to lower your php version. Check magento system requirements Dec 13 '19 at 14:05
  • Thanks, lot. It's now working. Dec 13 '19 at 14:37

in magento: 2.3, php: 7.2 I got same error: Deprecated Functionality: idn_to_ascii(): INTL_IDNA_VARIANT_2003 is deprecated ..

so I downgrade php version to 7.1 then its work. http://php.net/manual/en/migration72.deprecated.php

or another solution is to upgrade icu to ICU 4.6 http://www.linuxfromscratch.org/blfs/view/8.3/general/icu.html

to check icu current vesion uconv -V

more refer link

  • Thanks for your answer. It already answered by simonthesorcerer. Your answer also working Solutions. Dec 28 '19 at 8:38

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