Title: 554 Transaction failed: Expected parameter value, got “” Last modified: April 8, 2022 --- # 554 Transaction failed: Expected parameter value, got “” * Resolved [extremeleadprogramcom](https://wordpress.org/support/users/extremeleadprogramcom/) * (@extremeleadprogramcom) * [4 years, 2 months ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/) * For some reason, I am getting this error when trying to use this with Amazon SES and this site. * I use the plugin with Amazon SES on another site just fine. that site is hosted elsewhere. * The site I am having an issue with is hosted on Closte. * Any help/suggestions? * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2F554-transaction-failed-expected-parameter-value-got%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 15 replies - 1 through 15 (of 16 total) 1 [2](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/page/2/?output_format=md) [→](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/page/2/?output_format=md) * [A.Tariq](https://wordpress.org/support/users/arsalantariq/) * (@arsalantariq) * [4 years, 2 months ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15545906) * [@extremeleadprogramcom](https://wordpress.org/support/users/extremeleadprogramcom/) Hi, * Hope you are doing good. * Let me reproduce this issue on my staging websites but it seems like a server- side security issue, can you talk to your hosting support and ask about server Mod security and Smtp configuration issues? * Let me know if hosting support provide any solution. * Thanks * [unexploded](https://wordpress.org/support/users/unexploded/) * (@unexploded) * [4 years, 2 months ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15547782) * Hi there, sorry to jump in on this. However I am having the same problem, and I wonder if it’s a false flag. * We use Post SMTP on dozens of sites and we use Amazon SES. Only today have I had the same problem as above when trying to send a test email through the Wizard. Infact, the Wizard was returning the completely wrong server when trying to auto detect the server settings. * So I manually entered the details. When attempting to send a test, it returns the same error as above. * However, the actual form on the website sends fine. * I’d suggest OP try the same, which then makes me wonder if there’s a bug in the plugin’s test email function. * Thread Starter [extremeleadprogramcom](https://wordpress.org/support/users/extremeleadprogramcom/) * (@extremeleadprogramcom) * [4 years, 2 months ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15547916) * Ok, so I just realized that the “test” email returns the error… However, as stated by [@unexploded](https://wordpress.org/support/users/unexploded/) – my normal messages from the site are working just fine. * The same was happening for me in the auto-detect settings as well. * This leads me to believe there is some issue in the test portion? * [A.Tariq](https://wordpress.org/support/users/arsalantariq/) * (@arsalantariq) * [4 years, 2 months ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15549613) * [@extremeleadprogramcom](https://wordpress.org/support/users/extremeleadprogramcom/) [@unexploded](https://wordpress.org/support/users/unexploded/) * I will test it and will share updates soon. * Thanks * [unexploded](https://wordpress.org/support/users/unexploded/) * (@unexploded) * [4 years, 2 months ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15550767) * Great, thank you. Love the plugin! * Thread Starter [extremeleadprogramcom](https://wordpress.org/support/users/extremeleadprogramcom/) * (@extremeleadprogramcom) * [4 years, 2 months ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15551551) * Great and agreed! * [ruen06](https://wordpress.org/support/users/ruen06/) * (@ruen06) * [4 years, 1 month ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15560760) * Hi everyone, I am sorry to interrupt. I am also facing this issue and have checked all the settings. The last time I configure this plugin with the same details, it had no problem. * I leave a comment here so that I can receive follow-up replies as well. Thanks! * The status shown when I tried to send test email: Transaction failed: Expected parameter value, got “\” - This reply was modified 4 years, 1 month ago by [ruen06](https://wordpress.org/support/users/ruen06/). * [awolfyavis](https://wordpress.org/support/users/awolfyavis/) * (@awolfyavis) * [4 years, 1 month ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15562737) * Hi, Has anybody found a solution to this issue? All of a sudden it is happening across all of our websites regardless of the server (all dedicated). Is there an issue with a plugin update that could have caused this issue? * [M Haseeb](https://wordpress.org/support/users/haseeb0001/) * (@haseeb0001) * [4 years, 1 month ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15564093) * [@awolfyavis](https://wordpress.org/support/users/awolfyavis/) [@ruen06](https://wordpress.org/support/users/ruen06/) [@extremeleadprogramcom](https://wordpress.org/support/users/extremeleadprogramcom/) [@unexploded](https://wordpress.org/support/users/unexploded/) * we are reproducing this issue on our staging websites and will get back to you soon. * Thanls * [pt51](https://wordpress.org/support/users/pt51/) * (@pt51) * [4 years, 1 month ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15565650) * Me too!! * [M Haseeb](https://wordpress.org/support/users/haseeb0001/) * (@haseeb0001) * [4 years, 1 month ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15566607) * [@pt51](https://wordpress.org/support/users/pt51/) noted, will share updates soon after testing. * [M Haseeb](https://wordpress.org/support/users/haseeb0001/) * (@haseeb0001) * [4 years, 1 month ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15577156) * Hi [@awolfyavis](https://wordpress.org/support/users/awolfyavis/) [@extremeleadprogramcom](https://wordpress.org/support/users/extremeleadprogramcom/) [@ruen06](https://wordpress.org/support/users/ruen06/) [@pt51](https://wordpress.org/support/users/pt51/) [@unexploded](https://wordpress.org/support/users/unexploded/) * I can confirm that this issue is only related to testing emails. We are working on it on priority and will release a bug-fix version soon. * Thanks * [awolfyavis](https://wordpress.org/support/users/awolfyavis/) * (@awolfyavis) * [4 years, 1 month ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15579191) * [@haseeb0001](https://wordpress.org/support/users/haseeb0001/) we confirmed the same. Please update this thread when the testing issue is resolved. Thank you! * [M Haseeb](https://wordpress.org/support/users/haseeb0001/) * (@haseeb0001) * [4 years, 1 month ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15580282) * [@awolfyavis](https://wordpress.org/support/users/awolfyavis/) * Working on it and will release the beta version and update you here shortly… * Thanks * [M Haseeb](https://wordpress.org/support/users/haseeb0001/) * (@haseeb0001) * [4 years, 1 month ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/#post-15587196) * [@awolfyavis](https://wordpress.org/support/users/awolfyavis/) [@pt51](https://wordpress.org/support/users/pt51/) [@ruen06](https://wordpress.org/support/users/ruen06/) [@extremeleadprogramcom](https://wordpress.org/support/users/extremeleadprogramcom/) [@unexploded](https://wordpress.org/support/users/unexploded/) * Hope you all are doing good. * Issue fixed, Please update the plugin and let us know if it’s working fine or not. * Thanks Viewing 15 replies - 1 through 15 (of 16 total) 1 [2](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/page/2/?output_format=md) [→](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/page/2/?output_format=md) The topic ‘554 Transaction failed: Expected parameter value, got “”’ is closed to new replies. * ![](https://ps.w.org/post-smtp/assets/icon-128x128.gif?rev=3209655) * [Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App](https://wordpress.org/plugins/post-smtp/) * [Frequently Asked Questions](https://wordpress.org/plugins/post-smtp/#faq) * [Support Threads](https://wordpress.org/support/plugin/post-smtp/) * [Active Topics](https://wordpress.org/support/plugin/post-smtp/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/post-smtp/unresolved/) * [Reviews](https://wordpress.org/support/plugin/post-smtp/reviews/) * 16 replies * 7 participants * Last reply from: [M Haseeb](https://wordpress.org/support/users/haseeb0001/) * Last activity: [4 years ago](https://wordpress.org/support/topic/554-transaction-failed-expected-parameter-value-got/page/2/#post-15703172) * Status: resolved