Gmail as postfix SMTP relay in CentOS 7

Question

Followed these instructions: http://charlesauer.net/tutorials/centos/postfix-as-gmail-relay-centos.php

And still having trouble. Everytime I send a test message, /var/log/maillog still returns:

postfix/smtp[31970]: 7880343D513C: SASL authentication failed; server smtp.gmail.com[74.125.22.108] said: 534-5.7.14 <https://accounts.google.com/signin/continue?sarp=1&scc=1&plt=AKgnsbsS?534-5.7.14 SVSFq7E-OTTONQlngmEb_fm4fRMazei637OGMU4Kq2MXKcF0YWxX0rtwtXGsGjCywTNu_a?534-5.7.14 1y4zA0I0b3XAMM6zPiTef2Ob4Pk1KpBXT0NvqW2vVV5Y3-BJliImFGtngnAI0d2Dcyuua9?534-5.7.14 Y7Myd-hNV5QxUWrLytnHI4FQmQuU91MYI-AkVNqTF_JZGBuVX236dDoRt_i42DQPnFdlyB?534-5.7.14 WWXVYStViTgACtoFs_7sWtmhI168s> Please log in via your web browser and?534-5.7.14 then try again.?534-5.7.14  Learn more at?534 5.7.14  https://support.google.com/mail/answer/78754 q190sm2001023qhb.9 - gsmtp

I'm stuck. What else can I try to get SASL to work?

Answer 1

Solved with this, for anybody else who runs into it: https://support.google.com/accounts/answer/6010255?hl=en

You'll need to allow less secure applications to be able to connect to the mail account explicitly by going to the less secure apps page for your account and next to Access for less secure apps, select turn on.