hi
a quick question
is it better to send to say 500 recipients (mailing list style) in a
single email or to send separately to each recipient which will leave a
small around (1/2 second) time gap between each email.
to send to 500 recipients using a mailing list method qmail will do it in
less than 30 seconds
if i send separately then it will be around 250 seconds for 500 emails
rajesh
> Hi,
>
> I happen to work in E-Marketing, so here's my five cents (hope it's
> helpful!)...
>
> What I am going to say ASSUMES that highest possible deliverability is
> what you are after.
>
> Am 05.07.2010 um 16:12 schrieb Tonix (Antonio Nati):
>
>>
>> Main problem I see is related to qmail opening a new session for each
>> outgoing email.
>> Yahoo and others see hundreds of parallel sessions opened all together
>> from the same IP, so they close new connections from that IP, because
>> they feel to be attacked.
>> We need a mechanism to send several e-mails using the same connection.
>>
>> Tonino
>
> That in itself would not be a solution at all, I am afraid. A lot of ISPs
> actually limit (on purpose) the amount of messages they accept per
> connection plus the number of connections within given time plus the
> number of concurrent connections.
>
> You would need, and indeed major Email Service Providers have that at
> least for the major ISPs, one configuration profile per ISP to achieve
> ideal performance and deliverability. These profiles are not stable - ISPs
> often change them (without publicly broadcasting the fact) to throw off
> spammers.
>
> But it is worse than that. New (from the standpoint of the ISP) senders
> have to train or 'seed' their IP. That is to say: achieve a consistent
> mailing frequency (number of mailings per timeframe), mailing size
> (recipients per mailing), bounce rates (there should never be spikes in
> your hard bounces, e.g. 550 type errors) and last but not least complaint
> rate (which should be next to non-existant if you want good
> deliverability). Complaint rate means if someone in e.g. AOL marks a mail
> and clicks the 'This is spam' type button.
>
> Some of the checks ISPs make are automatic. They just monitor traffic and
> if there are spikes or 'irregular' behavior, your bandwidth gets limited,
> mails bounced, you name it.
>
> Also, no matter how you acquired the emails you HAVE to remove
> hard-bounces and not retry sending to them again. Codes / Messages vary
> from ISP to ISP.
>
> Last but not least it is very tedious to communicate with ISPs should you
> land on a blocklist (plus there are some public blocklists where you can
> never get removed)
>
> I am very confident that qmail can handle all of this volume-wise, but it
> lacks the proper tools to fine-tune for Deliverability as well as
> automated bounce and complaint management that are required to achieve
> results comparable to professional senders.
>
> I attached the latest forrester research results I have on the topic of
> emarketing vendors and would suggest you give that a thought.
>
> Again, this is only if your main concern is Deliverability.
>
> Cheers,
>
> Martin
>
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