On Fri, 2 Oct 2020, 21:54 Michael Peddemors via mailop, <[email protected]> wrote:
> Your iPhone should be connecting to port 587/465 and don't block > localhost.localdomain there.. clients should be able to send almost any > EHLO, just block localhost.localdomain on port 25. IMHO > > On 2020-10-02 1:34 p.m., John Devine via mailop wrote: > > I think IOS v14 changed to sending using that EHLO, it may have changed > > in the latest update as far as I am aware, I haven’t followed it > > extensively, but picked up on it reading various threads, I don’t think > > its Malware. > > > > JD > > > >> On 2 Oct 2020, at 21:13, Eric Tykwinski via mailop <[email protected] > >> <mailto:[email protected]>> wrote: > >> > >> Just had a client try to send emails from an iPhone using “EHLO > >> localhost.localdomain” which we have blocked. > >> I’ve never seen this before ever, so just checking if there is > >> something new out there. > >> Sincerely, > >> Eric Tykwinski > >> TrueNet, Inc. > >> P: 610-429-8300 > Just adding to this - last year ago I noticed one of my user's iPhones which insisted on HELOing (when accessing accounts using the Apple Mail app) as 0.0.0.1! Never managed to figure it out - I had the user eventually do a full factory reset and all manner of experiments while I logged from my side but nothing obvious showed up. Other iPhones on the same WiFi network and mail servers were fine. The user in question ended up using a third party mail client until they bought a new iPhone. I wondered if it was buggy behaviour of the factory Mail app given some combination of accounts set up in particular ways. Lack of hands on time with the device hindered more extensive troubleshooting. (original post at https://discussions.apple.com/thread/250155553) >
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