Clarify DeliveryMode=queueonly and not specifying queue interval

[EasyNews]

Can someone clarify what the difference is between specifying
O DeliveryMode=queueonly
and not setting a queue time or setting it to zero?

Don't these two options basically result in the same behaviour?

All messages are held in queue until the mail queue is forced?

Thanks in Advance!

[Neil W Rickert]

"EasyNews" <jcm...@jamestower.com> writes:

>Can someone clarify what the difference is between specifying
>O DeliveryMode=queueonly
>and not setting a queue time or setting it to zero?

>Don't these two options basically result in the same behaviour?

sendmail -bd -q15m
DeliveryMode=background ## the default

Sendmail attempts to send/deliver the mail on arrival, but in a
background process. If there is a temporary failure in the attempt
to send, then the message is dropped in the queue. Sendmail starts a
queue runner every 15 minutes.

sendmail -bd ### no queue interval
DeliveryMode=background ## the default

Sendmail attempts to send/deliver the mail on arrival, but in a
background process. If there is a temp failure the message is
dropped in the queue. It will stay in the queue forever, unless a
queue run is initiated by some other means.

sendmail -bd -q15m
DeliveryMode=queue

The mail is dropped into the queue on arrival. No attempt is
made to send/deliver at that time. A queue run is started every
15 minutes. Delivery will be attempted on these queue runs.

sendmail -bd ### no queue interval
DeliveryMode=queue

The mail is dropped into the queue on arrival. It will stay
there forever, unless a queue run is initiated elsewhere (via crontab,
or manually or with ETRN).