On 28-04-2021 22:41, Wietse Venema wrote:
Asai:
Greetings,
We are getting reports, more and more, of email clients (Type App, Mac
Mail, iOS Mail) that seem to send email, and show that the email has
been sent on the client, but the mail server has no record of email ever
reaching the SMTP se
Asai wrote:
Can someone advise as to what area of debugging we can turn on? There's a lot
of info in debugging, and we can't turn it all on at once, so we could use some
specifics.
Perhaps setting up SPF + DMARC RUF will help you to identify those systems.
Regards
Aban
--
Aban Dokht
On 28 Apr 2021, at 10:28, Asai wrote:
> We are getting reports, more and more, of email clients (Type App, Mac Mail,
> iOS Mail) that seem to send email, and show that the email has been sent on
> the client, but the mail server has no record of email ever reaching the SMTP
> service, nor does
On 28.04.21 09:28, Asai wrote:
We are getting reports, more and more, of email clients (Type App, Mac
Mail, iOS Mail) that seem to send email, and show that the email has
been sent on the client, but the mail server has no record of email
ever reaching the SMTP service, nor does it even seem th
On 2021-04-29 02:42, Demi Marie Obenour wrote:
Many legitimate ISPs (and even some cloud providers) block port 25
outbound, so yes.
might be why even microsoft, dreamhost, ovh, have clients try port 465,
587, and even some do try port 993, i cant find that mta that do guide
one this directio
On 4/28/21 6:59 PM, Asai wrote:
> Thank you, Wietse:
>>
>> This means that client systems are compromised with malware
>> that sends email directly to the outside world, bypassing
>> your mail server.
>>
>> To stop these, block outbound port 25 on your firewall for all
>> systems except your mail s
Thank you, Wietse:
This means that client systems are compromised with malware
that sends email directly to the outside world, bypassing
your mail server.
To stop these, block outbound port 25 on your firewall for all
systems except your mail server.
Wietse
Is it safe to assume that
Asai:
> Greetings,
>
> We are getting reports, more and more, of email clients (Type App, Mac
> Mail, iOS Mail) that seem to send email, and show that the email has
> been sent on the client, but the mail server has no record of email ever
> reaching the SMTP service, nor does it even seem that
On 2021-04-28 11:28, Asai wrote:
We are getting reports, more and more, of email clients (Type App, Mac
Mail, iOS Mail) that seem to send email, and show that the email has
been sent on the client, but the mail server has no record of email
ever reaching the SMTP service, nor does it even seem th
> On Apr 28, 2021, at 12:28 PM, Asai wrote:
>
> We are getting reports, more and more, of email clients (Type App, Mac Mail,
> iOS Mail) that seem to send email, and show that the email has been sent on
> the client, but the mail server has no record of email ever reaching the SMTP
> service,
>
>
> We are getting reports, more and more, of email clients (Type App, Mac
> Mail, iOS Mail) that seem to send email, and show that the email has
> been sent on the client, but the mail server has no record of email ever
> reaching the SMTP service, nor does it even seem that the client is
> conn
Greetings,
We are getting reports, more and more, of email clients (Type App, Mac
Mail, iOS Mail) that seem to send email, and show that the email has
been sent on the client, but the mail server has no record of email ever
reaching the SMTP service, nor does it even seem that the client is
c
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