Mail account unable to connect when on hotspot

Please check, if your hotspot has enough bandwidth, also some time ports are also closed in hotspot

jszrules wrote:

BobTheFisherman wrote:

Because when connecting using webmail you are connecting directly to the email provider's servers where they can control spam attempts. Connecting through hotspots or third party networks bypasses this spam control system. So email providers/ISPs often restrict sending of email from other than their own systems.

So the following is actually expected behavior?

ALLOWED: any wifi --> webmail (correct)

ALLOWED: any wifi --> POP client such as macOS Mail (Maybe, for receiving)

ALLOWED: iphone hotspot --> webmail (correct)

BLOCKED : iphone hotspot --> POP client such as macOS Mail (Maybe. for sending)

No, that is not what I described. The issue isn't the POP client the issue is only sending of email. You send email using an SMTP server. If I own a SMTP email server and you have an account I allow you to send email using my server as long as you are signed into your account on my server and you are sending from you@myserver address. If you are connected to the

Internet using some other access such as a hotspot and trying to send email using my SMTP server I or the owner of the hotspot may restrict you because you are trying to use another provider's service to send an email using my server not using their service. Spammers like doing this because it helps to protect their servers from being labeled as the origination of spam emails.

Maybe your email provider or network has spam control restrictions in place that prevent sending email when not connected to their network.

jszrules wrote:

Hi - starting recently (probably with Catalina), whenever using my iPhone's hotspot, one of my Mac's Mail accounts (pop gmail) is unable to connect to the server (even after trying to re-enter the username and password multiple times). As soon as I switch to another wifi, it automatically connects just fine. Any thoughts? Thanks!

This is a good question for the provider of your POP account. Call their Support.

https://support.google.com/mail/answer/7104828?hl=en

If you can’t send email on your Mac

https://support.apple.com/en-us/HT204075

jszrules wrote:

Thanks for the replies, but still a bit confused. I am still able to login to the webmail version of gmail when connected to hotspot, so not sure why I wouldn't be able to connect via POP. Is anyone else experiencing this issue with gmail POP when using their iPhone hotspot for connectivity instead of wifi?

Because when connecting using webmail you are connecting directly to the email provider's servers where they can control spam attempts. Connecting through hotspots or third party networks bypasses this spam control system. So email providers/ISPs often restrict sending of email from other than their own systems.