Title: Incorrect authentication data
Last modified: January 4, 2021

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# Incorrect authentication data

 *  [dkydev](https://wordpress.org/support/users/dkydev/)
 * (@dkydev)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/incorrect-authentication-data-12/)
 * > First off I just want to say thank you Yehudah!
   >  This plugin has helped me 
   > with so many of my clients and I couldn’t recommend you enough.
 * I don’t need a solution or anything just wanted to let you know what was going
   on.
 * **The Issue**
    I just wanted to flag something to you because I honestly have
   no idea what is happening. I installed the Post SMTP plugin just as I do with
   my other sites and followed through with the Wizard to ensure that all the credentials
   were correct but I keep getting an “Incorrect authentication data”.
 * **Actions I Took**
    So I went through the error page to see what was going on:`
   https://postmansmtp.com/incorrect-authentication-data/`
    - I tried adding the TXT records to my DNS [I’m using site ground]
    - `v=spf1 ip4:I_DUNNO_IF_I_CAN_SHOW_THIS include:spf.protection.outlook.com -
      all`
    - This didn’t work so I went through the rest to see what else could help. You
      mention restricting SMTP to root, but I couldn’t find that option on SiteGround.
      What I did find was the mention of an SPF validation protocol so I tried adding
      that to the DNS records too.
    - `v=spf1 +a +mx +ip4:DIFF_IP_ADDY include:_spf.mailspamprotection.com ~all`
    - That also didn’t work.
    - Then I thought it may be because I jumped around to so many different hosting
      platforms or something but I can’t seem to get your plugin to work with my
      personal site only. So I cleared up all my DNS records and tried redoing them
      all again but it still doesn’t seem to work.
    - I wish I copied the errors so I could show it to you but I forgot to do that
      still. Anyways I started disabling a bunch of plugins to see if there’s was
      a conflict… Nothing. Lastly, I tried an alternative: WP Mail SMTP by WPForms
      and for some reason this one works.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fincorrect-authentication-data-12%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  [Igor Ilgiyaev](https://wordpress.org/support/users/bigshow/)
 * (@bigshow)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/incorrect-authentication-data-12/#post-13981653)
 * Hey
    I am in SG too, Just talked to them and the issue from my side was a wrong
   password. try to create a test email and change it in the settings and than try
   to send a test.

Viewing 1 replies (of 1 total)

The topic ‘Incorrect authentication data’ is closed to new replies.

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 * 1 reply
 * 2 participants
 * Last reply from: [Igor Ilgiyaev](https://wordpress.org/support/users/bigshow/)
 * Last activity: [5 years, 3 months ago](https://wordpress.org/support/topic/incorrect-authentication-data-12/#post-13981653)
 * Status: not a support question