My Imap access has been blocked when I connect via my wifi connection. I'm using Aquamail on a Samsung S23 and until recently I have had no issues. Now I can access my email but only if I'm using my cellphone network. Wifi access fails with "incoming server login error" and then "Incoming mail (IMAP): Login Error. NO Your account is blocked contact
https://www.zoho.com/mail/help/imap....."