Gmail SMTP Relay Problem March 30, 2017, 05:26:12 am I am facing this problem since 11/03/2017 until now:Quote host smtp-relay.gmail.com[74.125.200.28] said: 550-5.7.0 Mail relay denied [175.140.19.146]. Invalid credentials for relay for 550-5.7.0 one of the domains in: elkarte.sch.my, sch.my (as obtained from HELO 550-5.7.0 and MAIL FROM). 550-5.7.0 Email is being sent from a domain or IP address which isn't registered 550-5.7.0 in your G Suite account. Please login to your G Suite account and 550-5.7.0 verify that your sending device IP address has been registered within 550-5.7.0 the G Suite SMTP Relay Settings. For more information, please visit 550 5.7.0 https://support.google.com/a/answer/6140680#maildenied j75sm1839186ita.2 - gsmtp (in reply to MAIL FROM command)I can't really find a working solution to this since the error is referring to G Suite account while I am using free Gmail account. I cannot setup and send any email directly from my server since I have no static IP and my ISP is blocking port 25 (outgoing).I do not find gmail info useful so far as they are all now referring to G Suite. Even using G Suite, it still failed though that may be my failure to set properly.[1].If anybody found any forum/site discussing a how to/solution to this, do link me to it as so far I haven't found one.1 I have tested with one of my G Suite accounts but failed though I may have set it wrong.↵
Re: Gmail SMTP Relay Problem Reply #1 – March 31, 2017, 02:36:10 am I resolved this by removing old settings and configure a new SMTP Relay in my G Suite account.To note, Gmail SMTP Relay as per my new reading is only available to G Suite account, so no more relay for non account holder a.k.a. free gmail account.[1].Sorry to bother you guys, but I thought somebody may have some interest on this.[2].1 I tested with free account too as previously it was working↵2 One day maybe ↵