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A given person is Shabbat-observant; his/her immediate and extended family is not.

May this individual write an email to his/her family (who live in Israel) when it is before Shabbat (where s/he currently lives), knowing full well that it is already Shabbat in Israel and that said family will likely read and reply to said email that night (= on Shabbat)?

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Would it extend their time doing melacha? If so, your question basically is: is one allowed to extend the time someone is doing melachot if he is already doing them? (my guess would be no) – Hacham Gabriel Jun 14 '13 at 18:26
Alternatively, making a phone call would probably fall under the same category. – Adam Mosheh Nov 14 '13 at 2:17
The reverse was practical for me some years back. I wrote a family update motzaei shabbat from Israel. Eventually, my grandmother would specifically check her email for my update on Shabbat afternoon (and reply, so I knew she was doing this). I felt guilty about it, so I started saving my email and sending it on Sunday morning. She never got up at 3AM motzaei Shabbat to reply ;-) – Ze'ev Felsen Mar 20 '14 at 6:52
Heard this answer in a shiur cant source it. The Rabbi who said it is a Rav. Take whatever you want from it but its not a psak. Generally a person is not allowed to put another Jew in a situation where he will break Shabbat, even though it is permitted for you to do a certain action. For example, you are totally permitted to send an email before Shabbat. Now if the recipient is Jewish and will receive your email on Shbbat and will read your email on Shabbat then you are forbidden from doing so. – armoose Jun 17 '14 at 9:25
up vote 1 down vote accepted

Partial answer: There is no Shabbos problem of sending it even if it is already Shabbos where the recipient is (see last paragraph here).

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Do you have a source for this p'sak? – WAF Jul 21 '14 at 22:59
@WAF, I added a source. – LiquidMetal Jul 21 '14 at 23:08
The source you provided stated that is permitted. But, your final statement is that it is indeed forbidden. Can you provide a source for your final statement which contradicts the Ohr Somayach source? – Lee Jul 22 '14 at 6:22
@Lee, there are two seperate איסורים here. The Ohr Somayach source says that there is no shabbos problem of sending the email; it does not deal with the lifnei iver or misayea l'dvar aveira problem. – LiquidMetal Jul 22 '14 at 16:19
Makes sense. But I'm still looking for a source that there is, in fact, a problem of "lifnei iver". – Lee Jul 22 '14 at 16:23

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