GMAIL "SMTP Error: Could not authenticate"

Chris yes, I like it and use Mandrill for all my websites.
Anyway I prefer to use this SMTP plugin instead of wpmandrill, always prefer something lightweight.

Hi – Yeah – haha – I did read about it. I still couldn’t figure out it’s purpose. It sends emails. But I have mailchimp that does that for marketing and gmail for interactions and that’s all I send – except for those few that send from my website. And the SMTP issues I have ARE from sending emails from my website, which my host forbids via smtp for some stupid reason. And unfortunately, changing any time soon is out of the question.
If I could see a way through Mandrill to send the way I’d like, but their website is very glyphic. How would I get around the host – and still send emails ‘from’ my domain? It doesn’t say anything like that. And also says get a developer before starting. haha
Any way – this plugin doens’t work for me at all. I had to dump it and the (purchased) scheduling plugin that relied on stopping the goofy ‘from’ address: [email protected] – this after hours of fighting with it – and my host. Good luck. ??

Chris you’re using Google Apps? Try this.

Yeah thanks – I tried that too. Got everything set up correctly until it told me my host was blocking the outgoing smtp ports – ALL OF THEM – and then it could help no more. Highly recommended though. Thanks for the help!

Oh no! Yup that’s a problem. But you just gave me an idea — sending mail to Gmail via the Gmail API. There’s no way your host could ALSO be blocking the HTTP/HTTPS port..

Yeah – that would be ideal!

wordpress latest version 4.1.1 not supported any smtp plugin

@himanshu_ag, I don’t think that’s true

Chris, it’s done.

@jason Hendriks you are right.A little changes in settings, under mailer section i had selected Use the PHP mail() function to send emails. currently my plugin is working properly https://bit.ly/17ZJWWA

@himanshu_ag if you select Use the PHP mail function you are not using SMTP.

Well, technically PHP Mail has to use SMTP, because SMTP is the only protocol for moving mail on the Internet. PHP Mail just assumes there is an SMTP server installed on localhost at port 25. If there is no server… it can’t work.

Hello, This is SocksCap64.
I got this error too and now it’s works fine.
record here may help the other people meet this error.

1, open https://myaccount.google.com/
at the tab ‘Signing in’ you will find ‘Access for less secure apps’ is turn off.
change it to ‘turn on’

2, open https://accounts.google.com/DisplayUnlockCaptcha
it’s will response:

Account access enabled
Please try signing in to your Google account again from your new device or application.

the problem is resolved.

Correction: as @jason Hendriks’s reply, my solution reduce my security, so the better choice is use OAuth 2.0.
https://www.ads-software.com/plugins/postman-smtp/

i already installed this plugin, and it’s working fine.

the configure has a bit inconvenient( need to create a new project at GAE ).