Why does it take Calibre so long to e-mail?

intelligen · 08-18-2011, 02:46 PM

I'm running Calibre on a laptop with an i7-2720M and 6 GB of RAM, and it only takes a couple minutes for Calibre to download and convert all of my news feeds. The problem is, it takes 5-1/2 to 7 minutes to e-mail each document. When I manually attach the largest one of the .mobi files to an e-mail, it takes less than 2 minutes. The smallest one takes less than 10 seconds to manually attach to an e-mail. In both cases, I'm using a gmail account, and I'm not running any other network-intensive applications in the background. What can I do to speed up the e-mail process?

theducks · 08-18-2011, 02:54 PM

Quote:

Originally Posted by intelligen

I'm running Calibre on a laptop with an i7-2720M and 6 GB of RAM, and it only takes a couple minutes for Calibre to download and convert all of my news feeds. The problem is, it takes 5-1/2 to 7 minutes to e-mail each document. When I manually attach the largest one of the .mobi files to an e-mail, it takes less than 2 minutes. The smallest one takes less than 10 seconds to manually attach to an e-mail. In both cases, I'm using a gmail account, and I'm not running any other network-intensive applications in the background. What can I do to speed up the e-mail process?

Calibre has a timer to prevent multiple (separate) mailings from triggering ISP bulk mailer filters.

itimpi · 08-18-2011, 02:54 PM

If multiple emails are to be sent, then calibre deliberately spaces them out. I believe the default delay between emails sent via gmail is something like 5 minutes.

intelligen · 08-18-2011, 03:11 PM

Thanks, that would definitely explain it, although 5 minutes seems a bit excessive. I do sometimes send more than a couple legitimate e-mails in a 5-minute span.

If I use something other than gmail, will the delay be shorter? Is there any way for me to change the delay or add more SMTP servers to get around the problem?

Also, is it possible to send multiple attachments to my Kindle in one e-mail? That would be a nice optimization if it decreases the number of delays.

Diana495 · 08-18-2011, 03:23 PM

You can change the time between emails by going to Preferences -> Tweaks -> then click on The number of seconds to wait before sending emails, and set public_smtp_relay_delay = to a number you want. For no delay, set it to 0.

intelligen · 09-27-2011, 03:46 PM

Forgot to reply to this before, but thanks for the tip! I lowered the delay to 15 seconds and I haven't had any problems.

08-18-2011, 02:46 PM	#1
intelligen Junior Member Posts: 3 Karma: 10 Join Date: Aug 2011 Device: kindle	Why does it take Calibre so long to e-mail? I'm running Calibre on a laptop with an i7-2720M and 6 GB of RAM, and it only takes a couple minutes for Calibre to download and convert all of my news feeds. The problem is, it takes 5-1/2 to 7 minutes to e-mail each document. When I manually attach the largest one of the .mobi files to an e-mail, it takes less than 2 minutes. The smallest one takes less than 10 seconds to manually attach to an e-mail. In both cases, I'm using a gmail account, and I'm not running any other network-intensive applications in the background. What can I do to speed up the e-mail process?

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08-18-2011, 02:54 PM	#3
itimpi Wizard Posts: 4,552 Karma: 950151 Join Date: Nov 2008 Device: Sony PRS-950, iphone/ipad (Marvin/iBooks/QuickReader)	If multiple emails are to be sent, then calibre deliberately spaces them out. I believe the default delay between emails sent via gmail is something like 5 minutes.

08-18-2011, 03:11 PM	#4
intelligen Junior Member Posts: 3 Karma: 10 Join Date: Aug 2011 Device: kindle	Thanks, that would definitely explain it, although 5 minutes seems a bit excessive. I do sometimes send more than a couple legitimate e-mails in a 5-minute span. If I use something other than gmail, will the delay be shorter? Is there any way for me to change the delay or add more SMTP servers to get around the problem? Also, is it possible to send multiple attachments to my Kindle in one e-mail? That would be a nice optimization if it decreases the number of delays.

08-18-2011, 03:23 PM	#5
Diana495 Connoisseur Posts: 80 Karma: 8320 Join Date: Apr 2009 Device: Ipod Touch	You can change the time between emails by going to Preferences -> Tweaks -> then click on The number of seconds to wait before sending emails, and set public_smtp_relay_delay = to a number you want. For no delay, set it to 0.

09-27-2011, 03:46 PM	#6
intelligen Junior Member Posts: 3 Karma: 10 Join Date: Aug 2011 Device: kindle	Forgot to reply to this before, but thanks for the tip! I lowered the delay to 15 seconds and I haven't had any problems.

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