Hi, anyone other having problems sending mail on iOS (15.4.1) from Gmail ?
Translation: Failed to send the email Connection to the sending serveur “smtp.gmail.com” failed. Other sending servers can be configured for mail accounts in Settings > Mail Accounts.
What’s really strange is that my mail will be send, once I turn off wifi?!
There’s no VPN actif. I tried the different Gmail troubleshooting options (CAPTCHA reset, delete and reauthenticate as described on iGeeksBlog) as well as the Apple Mail Support setup for Gmail. Nothing changed or, more precisely, I can’t modify the port of the smtp server to 587 nor add a second one in my Gmail account setup. If this is helpful, I used the Add new account > Google > google.com authentication site in order to create my mail account.
I’m not having trouble; my SMTP server settings resemble yours.
Do you have some sort of different DNS setting for WiFi by any chance? Settings / WiFi, tap the information icon on the right of your access point name; are there custom settings under “configure DNS”?
Also check whether your ISP allows connections like these. I remember reading, years ago, about service providers that (in some attempt to prevent spam) would only allow outbound e-mail to go through their own servers and would block connections to any third-party servers. If your ISP is doing this, then you may need to configure your outbound mail to use your ISP’s SMTP server instead of Google’s.
If that’s not an option, maybe Google offers some alternate port numbers that might work. I see you’re using port 465, which is Google’s port for SSL access. But SSL is considered insecure these days. Google supports TLS protocol on port 587. See what happens if you change the port number from 465 to 587.
FWIW, my phone is using port 465, which works fine via my ISP, Comcast. The headers of my outbound mail show that TLS version 1.3 is used for the communication.
Great explanation, Thanks David! I’ll check this and report back if this resolved my problem. Furthermore, I will test tomorrow the behaviour with a different ISP in a friends home. Maybe I can narrow down the problem.
Thanks to @ddmiller and @Shamino for your quick and effectif help. I could change my router’s configuration and open up port 465 in order to use Gmail’s OAuth 2.0 API. Sending mail over wifi with my iPhone works again.
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